TUT Portfolio - TUT Bibliography - SSSAG publications

    Värri, Alpo 2011.
    Medical Device Software - Missä mennään standardisoinnin osalta? .
    Tervesyteknologian ja terveydenhoidon kehityksen vaikutus lainsäädäntöön ja standardisointiin, 16.9.2011, Vantaa, Finland

    Alametsä, Jarmo; Viik, Jari; Huupponen, Eero; Kulkas, Antti; Värri, Alpo; Himanen, Sari-Leena 2010.
    Snoring second detection with EMFi sensor strips . 2010 12th Biennial Baltic Eletronics Conference BEC, 4.-6.10.2010, Tallinn, Estonia 265-268.
    http://dx.doi.org/10.1109/BEC.2010.5630889

    Junnila, Sakari; Värri, Alpo 2010.
    Henkilökohtaisen terveydenseuranta ja liityntästandardit.Kartoitus tilanteesta vuoden 2010 alussa
    In: Väinälä Anna; Hyppönen Hannele (ed.) . Terveyden ja hyvinvoinnin laitos, Avauksia num. 15, 28-34.

    Mikkonen, Jarno E; Leppänen, Paavo H. T.; Värri, Alpo 2010.
    Aineistolähtöinen signaalinkäsittely oppimishäiriöiden, eritoten dysleksian, tunnistamisessa
    In: Väinälä, Anna; Hyppönen, Hannele (ed.) . Sosiaali- ja terveydenhollon tietojenkäsittelyn tutkimuspäivät, Tutkimuspaperit 2010. Terveyden- ja hyvinvoinnin laitos, Avauksia num. 15/2010, 53-57.

    Värri, A. 2010.
    Review of the latest draft version of Guidelines for the qualification and classification of software used in healthcare environment within the regulatory framework of medical devices .
    Suomen Standardisoimisliiton (SFS) Terveydenhuollon tietotekniikan seurantaryhmän SR301 kokous, 9.9.2010 27 s.

    Värri, Alpo 2010.
    e-Health ohjelmistot ja uuden lääkelaitedirektiivin vaikutukset . The 15th Finnish National conference on Telemedicine and eHealth, MS Viking Mariella, Helsinki - Stockholm, 8-10 April 2010 65-66.

    Alametsä, J., Värri, A., Viik, J., Hyttinen, J. & Palomäki, A. 2009.
    Ballistocardiographic studies with acceleration and electromechanical film sensors .
    Medical Engineering & Physics vol. 31, num. 9, 1154-1165.
    http://dx.doi.org/10.1016/j.medengphy.2009.07.020

    Junnila, S., Akhbardeh, A. & Värri, A. 2009.
    An electromechanical film sensor based wireless ballistocardiographic chair: Implementation and performance .
    Journal of Signal Processing Systems vol. 57, num. 3, Springer New York . pp. 305-320.
    http://dx.doi.org/10.1007/s11265-008-0307-2

    Lipping, T., Rorarius, M., Jäntti, V., Annala, K., Mennander, A., Ferenets, R., Toivonen, T., Toivo, T., Värri, A. & Korpinen, L. 2009.
    Using the nonlinear control of anaesthesia-induced hypersensitivity of EEG at burst suppression level to test the effects of radiofrequency radiation on brain function .
    Nonlinear Biomedical Physics vol. 3, num. 3:5, 1-10.
    http://dx.doi.org/10.1186/1753-4631-3-5

    Värri, A. 2009.
    EU:n lääkedirektiivi ja terveydenhuollon ohjelmistot .
    HL 7 Finland IHE SIG -kokous, Helsinki, 20 August 2009 18 p.

    Värri, A. 2009.
    MDD and software, some opinions from Finland .
    Medical Device Directive and Health Software, Brussels, Belgium, 18 June 2009 9 p.

    Virkkala, J., Värri, A., Hasan, J., Himanen, S-L. & Müller, K. 2009.
    Sleep stage classification with low complexity and low bit rate .
    Proceedings of the 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society "Engineering the Future of Biomedicine", Minneapolis, Minnesota, USA, 2-6 September 2009 pp. 2506-2509.

    Alametsä, J., Viik, J., Alakare, J., Värri, A. & Palomäki, A. 2008.
    Ballistocardiography in sitting and horizontal positions .
    Physiological Measurement vol. 29, IOP Publishing . pp. 1071-1087.
    http://dx.doi.org/10.1088/0967-3334/29/9/006

    Lukin, V., Zriakhov, M., Zelensky, A. A., Egiazarian, K. & Värri, A. 2008.
    Lossy compression of multichannel ECG based on 2-D DCT and pre-processing .
    Proceedings of the International Conference TCSET'2008, Modern Problems of Radio Engineering, Telecommunications and Computer Science, Lviv-Slavsko, Ukraine, 19-23 February 2008 pp. 159-162.

    Virkkala, J., Hasan, J., Velin, R., Himanen, S-L., Värri, A. & Van Someren, E.J.W. 2008.
    Automatic sleep detection using activity and facial electrodes .
    Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2008, Vancouver, Canada, 20-24 August 2008 pp. 1639-1642.

    Virkkala, J., Velin, R., Himanen, S-L., Värri, A., Müller, K. & Hasan, J. 2008.
    Automatic sleep stage classification using two facial electrodes .
    Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2008, Vancouver, Canada, 20-24 August 2008 pp. 1643-1646.

    Virkkala, J., Velin, R., Lapveteläinen, N., Himanen, N., Värri, A., Sallinen, M., Härmä, M. & Hasan, J. 2008.
    Visual and semi-automatic sleep stage scoring using only electro-oculography .
    SLEEP 2008, 22nd Annual Meeting of the Associated Professional Sleep Societies, LLC, Valtimore, Maryland, USA, 7-12 June 2008. Sleep, Journal of Sleep and Sleep Disorders Research vol. 31, p. A333.

    Akhbardeh, A., Junnila, S., Koivistoinen, T. & Värri, A. 2007.
    An intelligent ballistocardiographic chair using a novel SF-ART neural network and biorthogonal wavelets .
    Journal of Medical Systems vol. 31, num. 1, pp. 69-77.
    http://dx.doi.org/10.1007/s10916-006-9044-x

    Akhbardeh, A., Junnila, S., Koivuluoma, M., Koivistoinen, T., Turjanmaa, V., Kööbi, T. & Värri, A. 2007.
    Towards a heart disease diagnosing system based on force sensitive chair's measurement, biorthogonal wavelets and neural networks .
    Engineering Application of Artificial Intelligence vol. 20, num. 4, pp. 493-502.
    http://dx.doi.org/10.1016/j.engappai.2006.07.005

    Akhbardeh, A., Junnila, S., Koivuluoma, M., Koivistoinen, T. & Värri, A. 2007.
    Applying novel time-frequency moments singular value decomposition method and artificial neural networks for ballistocardiography .
    Eurasip Journal on Advances in Signal Processing vol. 2007, 9 p.
    http://dx.doi.org/10.1155/2007/60576

    Alametsä, J., Värri, A. & Palomäki, A. 2007.
    Long term follow-up of ballistocardiography .
    In: Häyrinen, K. (ed.). Sosiaali- ja terveydenhuollon tietotekniikan ja tiedonhallinnan tutkimuspäivät, Turku, Finland, 30-31 May 2007. Stakesin työpapereita vol. 14/2007, 5 p.

    Barna, L., Dougherty, J., Astola, J. & Värri, A. 2007.
    Estimation of respiratory rate with the ballistocardiographic chair .
    Tampere University of Technology, Institute of Signal Processing, Report num. 2, Tampere, 5 p.

    Barna, L., Koivuluoma, M., Hasu, M., Tuppurainen, J. & Värri, A. 2007.
    The use of electromechanical film (EMFi) sensors in building a robust touch-sensitive tablet-like interface .
    IEEE Sensors Journal vol. 7, num. 1, pp. 74-80.
    http://dx.doi.org/10.1109/JSEN.2006.888608

    Huupponen, E., Gomez-Herrero, G., Saastamoinen, A., Värri, A., Hasan, J. & Himanen, S-L. 2007.
    Development and comparison of four sleep spindle detection methods .
    Artificial Intelligence in Medicine vol. 40, num. 3, Elsevier B.V. . pp. 157-170.
    http://dx.doi.org/10.1016/j.artmed.2007.04.003

    Koivuluoma, M. & Värri. A. 2007.
    Data mining of the SIESTA polygraphic sleep recording database .
    Abstracts of the 5th Nordic Neuroinformatics Workshop, Espoo, Finland, 27 October 2007 p. 21.

    Saastamoinen, A., Huupponen, E., Värri, A., Hasan, J. & Himanen, S.-L. 2007.
    Systematic performance evaluation of a continuous-scale sleep depth measure .
    Medical Engineering & Physics vol. 29, num. 10, pp. 1119-1131.
    http://dx.doi.org/10.1016/j.medengphy.2006.11.004

    Värri, A. 2007.
    CEN/TC251/ENV FEF14271 review .
    Joint Meeting of ISO/TC215 - Health Informatics, WG7 - Devices, CEN/TC251 WGIV - Devices, IEEE EMBS 11073, and HL7 Health Care Devices (DEV) SIG, Cologne, Germany, 7 april 2007

    Värri, A. 2007.
    Long way to a global standard format for digitized biosignals .
    Proceedings of the 2nd International Symposium on Medical Information and Communication Technology, ISMICT'07, Oulu, Finland, 11-13 December 2007 2 p.

    Värri, A. 2007.
    Mittaava tuoli .
    IX HYVITE Symposium, Istumisen haasteet, Tampere, Finland, 22 November 2007 26 p.

    Virkkala, J., Hasan, J., Värri, A., Himanen, S.-L. & Härmä, M. 2007.
    The use of two-channel electro-oculography in automatic detection of unintentional sleep onset .
    Journal of Neuroscience Methods vol. 163, num. 1, Elsevier . pp. 137-144.
    http://dx.doi.org/10.1016/j.jneumeth.2007.02.001

    Virkkala, J., Hasan, J., Värri, A., Himanen, S-L. & Müller, K. 2007.
    Automatic detection of slow wave sleep using two channel electro-oculography .
    Journal of Neuroscience Methods vol. 160, num. 1, Elsevier . pp. 171-177.
    http://dx.doi.org/10.1016/j.jneumeth.2006.08.002

    Virkkala, J., Hasan, J., Värri, A., Himanen, S.-L. & Muller, K. 2007.
    Automatic estimation of wakefulness and sleep using electro-oculography .
    Proceedings of SENSATION 2nd International Conference, Monitoring sleep and sleepiness with new sensors within medical and industrial applications, Chania, Greece, 3-5 June 2007 5 p.

    Virkkala, J., Hasan, J., Värri, A., Himanen, S-L. & Müller, K. 2007.
    Automatic sleep stage classification using two-channel electro-oculography .
    Journal of Neuroscience Methods vol. 166, num. 1, Elsevier . pp. 109-115.
    http://dx.doi.org/10.1016/j.jneumeth.2007.06.016

    Virkkala, J., Hasan, J., Värri, A., Himanen, S. & Muller, K. 2007.
    Automatic 24h estimation of wakefulness and sleep using electro-oculography .
    SLEEP 2007, 21st Annual Meeting of the Associated Professional Sleep Societies, LLC, Minneapolis, Minnesota, 9-14 June 2007. Sleep, Journal of Sleep and Sleep Disorders Research vol. 30, p. A341.

    Virkkala, J., Hasan, J., Värri, A., Huupponen, E., Himanen, S.-L. & Muller, K. 2007.
    Reducing the effects of electrocardiographic artifacts on electro-oculography in automatic sleep analysis .
    Proceedings of the 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2007, Lyon, France, 23-26 August 2007 pp. 590-593.

    Akhbardeh, A., Junnila, S., Koivistoinen, T. & Värri, A. 2006.
    Applying novel supervised fuzzy adaptive resonance theory (SF-ART) network and biorthogonal wavelets for ballistocardiogram diagnosis .
    Proceedings of the 2006 IEEE International Symposium on Intelligent Control , ISIC, Munich, Germany, 4-6 October 2006 pp. 143-148.

    Akhbardeh, A., Junnila, S., Koivistoinen, T. & Värri, A. 2006.
    Design an intelligent ballistocardiographic chair using novel quicklearn and SF-SRT algorithms and biorthogonal wavelets .
    Proceedings of 2006 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2006, Taipei, Taiwan, 8-11 October 2006 pp. 878-883.

    Akhbardeh, A., Junnila, S. & Värri, A. 2006.
    Applying biorthogonal wavelets and a novel quicklearn algorithm for an intelligent ballistocardographic chair .
    Proceedings of 2006 IEEE Mountain Workshop on Adaptive and Learning Systems, SMCals, Logan, Utah, USA, 24-26 July 2006 pp. 42-47.

    Akhbardeh, A. & Värri, A. 2006.
    Applying novel quicklearn algorithm for pattern recognition .
    Proceedings of 2006 IEEE Conference on Systems, Man, and Cybernetics, SMC, Taipei, Taiwan, 8-11 October 2006 pp. 851-855.

    Akhbardeh, A. & Värri, A. 2006.
    QuickLearn- a novel supervised on-line learning algorithm for pattern recognition .
    Proceedings of 2006 IEEE Mountain Workshop on Adaptive and Learning Systems, SMCals, Logan, Utah, USA, 24-26 July 2006 pp. 207-212.

    Alametsä, J., Rauhala, E., Huupponen, E., Saastamoinen, A., Värri, A., Joutsen, A., Hasan, J. & Himanen, S-L. 2006.
    Automatic detection of spiking events in EMFi sheet during sleep .
    Medical Engineering & Physics vol. 28, num. 3, pp. 267-275.
    http://dx.doi.org/10.1016/j.medengphy.2005.07.008

    Alametsä, J., Saastamoinen, A., Huupponen, E., Värri, A., Joutsen, A., Hasan, J., Rauhala, E. & Himanen, S-L. 2006.
    Prolonged spiking periods pattern detection method by using EMFit and SCSB signals .
    In: Hyvönen, E. et al. (eds.). Proceedings of the 12th Finnish Artificial Intelligence Conference STeP 2006, Espoo, Finland, 26-27 October 2006 pp. 75-81.

    Barna, L. C., Koivuluoma, M., Vlad, M. & Värri, A. 2006.
    Multichannel signal measurement and display .
    In: Jan, J. et al. (eds.). Proceedings of the 18th Biennial International Eurasip Conference, Biosignal 2006, Brno, Czech Republic, 28-30 June 2006 pp. 143-145.

    Barna, L., Koivuluoma, M., Micheloyannis, S., Zervakis, M. & Värri, A. 2006.
    Spectral analysis for the differentiation between normal and mild epileptic children .
    Proceedings of The International Special Topic Conference on Information Technology in biomedicine, ITAB 2006, Ioannina, Greece, 26-28 October 2006 5 p.

    Huupponen, E., De Clercq, W., Gomez-Herrero, G., Saastamoinen, A., Egiazarian, K., Värri, A., Vanrumste, B., Vergult, A., Van Huffel, S., Van Paesschen, W., Hasan, J. & Himanen, S-L. 2006.
    Determination of dominant simulated spindle frequency with different methods .
    Journal of Neuroscience Methods vol. 156, num. 1-2, Elsevier . pp. 275-283.

    Huupponen, E., Saastamoinen, A., Eskelinen, V., Värri, A., Hasan, J. & Himanen, S-L. 2006.
    Apnea patients show a frontopolar inter-hemispheric spindle frequency difference .
    Neuroscience Letters vol. 403, num. 1-2, pp. 186-189.

    Junnila, S., Akhbardeh, A., Barna, L. C., Defee, I. & Värri, A. 2006.
    A wireless ballistocardiographic chair .
    Proceedings of the 28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC, New York City, USA, August 30 - September 3, 2006 pp. 5932-5935.

    Saastamoinen, A., Huupponen, E., Värri, A., Hasan, J. & Himanen, S.-L. 2006.
    Computer program for automated sleep depth estimation .
    Computer Methods and Programs in Biomedicine vol. 82, num. 1, pp. 58-66.

    Saastamoinen, A., Oja, H., Huupponen, E., Värri, A., Hasan, J. & Himanen, S-L. 2006.
    Topographic differences in mean computational sleep depth between healthy controls and obstructive sleep apnoea patients .
    Journal of Neuroscience Methods vol. 157, num. 1, Elsevier . pp.178-184.

    Sun, L., Hu, P., Goh, C., Hamadicharef, B., Hess, M., Ifeachor, E., Barbounakis, I., Zervakis, M., Nurminen, N. & Värri, A. 2006.
    Bioprofiling over Grid for early detection of dementia .
    Proceedigs of the First International Conference on Scalable Information systems, INFOSCALE 2006, Hong Kong, 29 May - 1 June 2006. ACM International Conference Proceedings Series vol. 152, ACM . 10 p.

    Värri, A. 2006.
    Digitaalinen tallennus (biosignaalit) .
    Tietojärjestelmien Integraatio, Kuopion yliopiston Kesäkoulu 2006, Kuopio, Finland, 17-18 August 2006 30 s.

    Värri, A. 2006.
    File exchange format for vital signs, ENV 14271 and its use in electronic interchange of polysomnography data .
    Workshop to Develop Guidelines for Electronic Interchange of Polysomnography Data, Philadelphia, PA, USA, 27 January 2006 27 p.

    Virkkala, J., Hasan, J., Värri, A., Himanen, S-L. & Härmä, M. 2006.
    Automatic unintentional sleep onset detection using two channel electro-oculography .
    Nordic Congress of Clinical Neurophysiology, NCCN 2006, Helsinki, Finland, 21-24 May 2006 pp. 83.

    Virkkala, J., Hasan, J., Värri, A., Himanen, S. & Müller, K. 2006.
    Automatic sleep scoring system using two channel electro-oculography .
    Abstracts of the 18th Congress of the European Sleep Research Society, Innsbruck, Austria, 12-16 September 2006. Journal of Sleep Research vol. 15, num. s1, p. 169.

    Akhbardeh, A., Junnila, S., Koivistoinen, T., Kööbi, T. & Värri, A. 2005.
    Ballistocardiogram classification using a novel transform so-called AliMap and biorthogonal wavelets .
    Proceedings of IEEE International Symposium on Intelligent Signal Processing, WISP 2005, University of Algarve, Portugal, 1-3 September 2005 6 p.

    Akhbardeh, A., Junnila, S., Koivuluoma, M., Koivistoinen, T. & Värri, A. 2005.
    Evaluation of heart condition based on ballistocardiogram classification using compactly supported wavelet transforms and neural networks .
    Proceedings of the 2005 IEEE Conference on Control Applications, Toronto, Canada, 29-31 August 2005 pp. 843-848.

    Akhbardeh, A., Junnila, S., Koivuluoma, M., Koivistoinen, T. & Värri, A. 2005.
    The heart disease diagnosing system based on force sensitive chair's measurement, biorthogonal wavelets and neural networks .
    Proceedings of the 2005 IEEE/ASME International Conference on Advanced Intelligent Mechatorinis, AIM 2005, Monterey, California, USA, 24-28 July 2005 pp. 676-681.

    Akhbardeh, A., Koivuluoma, M., Koivistoinen, T. & Värri, A. 2005.
    Ballistocardiogram diagnosis using neural networks and shift-invariant daubechies wavelet transform .
    Proceedings of 13. European Signal Processing Conference, EUSIPCO, Antalya, Turkey, 4-8 September 2005 4 p.

    Akhbardeh, A., Koivuluoma, M., Koivistoinen, T. & Värri, A. 2005.
    BCG data clustering using new method so-called time-frequency moments singular value decomposition (TFM-SVD) and artificial neural networks .
    Proceedings of the 2005 IEEE International Symposium on Intelligent Control and 2005 Mediterranean Conference on Control and Automation, Limassol, Cyprus, 27-29 June 2005 pp. 1447-1451.

    Akhbardeh, A., Koivuluoma, M., Koivistoinen, T. & Värri, A. 2005.
    BCG data discrimination using daubechies compactly supported wavelet transform and neural networks towards heart disease diagnosing .
    Proceedings of the 2005 IEEE International Symposium on Intelligent Control and 2005 Mediterranean Conference on Control and Automation, Limassol, Cyprus, 27-29 June 2005 pp. 1452-1457.

    Akhbardeh, A. & Värri, A. 2005.
    Novel supervised fuzzy adaptive resonance theory (SF-ART) neural network for pattern recognition .
    Proceedings of IEEE International Symposium on Intelligent Signal Processing, WISP 2005, University of Algarve, Portugal, 1-3 September 2005 6 p.

    Alametsä, J. J., Saastamoinen, A. J., Huupponen, E. J., Värri, A. O., Joutsen, A., S., Hasan, J., Rauhala, E. R. & Himanen, S-L. J. 2005.
    Comparison of temporal and spectral properties of EMFi and SCSB signals .
    In: Hamza, M. H. (Ed.). Proceedings of the Third IASTED International Conference on Biomedical Engineering, Innsbruck, Austria, 16-18 February 2005 pp. 379-382.

    Alametsä, J., Saastamoinen, A., Huupponen, E. & Värri, A. 2005.
    Effect on sauna bath to BCG, carotid and ankle pulse signal during normal blood pressure and hypertension .
    Proceedings of the 3rd European Medical & Biomedical Engineering Conference, IFMBE European Conference on Biomedical Engineering, EMBEC 2005, Prague, Czech Republic, 20-25 November 2005 vol. 11, 5 p.

    Alametsä, J., Saastamoinen, A. J., Huupponen, E. & Värri, A. 2005.
    Spectral properties of BCG signal in sitting and lying positions in normal blood pressure and hypertension .
    Proceedings of the 3rd European Medical & Biomedical Engineering Conference, IFMBE European Conference on Biomedical Engineering, EMBEC 2005, Prague, Czech Republic, 20-25 November 2005 vol. 11, 6 p.

    Barna, L. C., Koivuluoma, M. & Värri, A. 2005.
    Heart-rate detection using EMFi sensors on a normal looking chair .
    Proceedings of the 3rd European Medical & Biomedical Engineering Conference, IFMBE European Conference on Biomedical Engineering, EMBEC 2005, Prague, Czech Republic, 20-25 November 2005 vol. 11, 5 p.

    Gomez Herrero, G., Huupponen, E., Värri, A., Egiazarian, K., Vanrumste, B., Vergult, A., De Clercq, W., Van Huffel, S. & Van Paesschen, W. 2005.
    Independent component analysis of single trial evoked brain reponses: is it reliable? .
    In: Fonseca, J. M. (Ed.). Proceedings of the 2nd International conference on Computational Inteeligence in Medical and Healthcare, CIMED 2005, Costa da Caparica, Portugal, 29 June - 1 July 2005 pp. 69-76.

    Huupponen, E., Gomez Herrero, G., Egiazarian, K., Saastamoinen, A., Värri, A., Vanrumste, B., Vergult, A., De Clercq, W., Van Huffel, S. & Van Paesschen, W. 2005.
    Bioprofile on sleep .
    In: Fonseca, J. M. (Ed.). Proceedings of the 2nd International conference on Computational Inteeligence in Medical and Healthcare, CIMED 2005, Costa da Caparica, Portugal, 29 June - 1 July 2005 pp. 30-36.

    Huupponen,E., Gomez Herrero, G., Saastamoinen, A., Egiazarian, K., Värri A., Vanrumste, B., Vergult, A., de Clercq, W., van Huffel, S., van Paesschen, W., Hasan, J. & Himanen, S-L. 2005.
    Dictionaries of waveforms for frequency analysis of simulated spindles .
    In: Fonseca, J. M. (Ed.). Proceedings of the 2nd International conference on Computational Inteeligence in Medical and Healthcare, CIMED 2005, Costa da Caparica, Portugal, 29 June - 1 July 2005 pp. 348-354.

    Huupponen, E. J., Saastamoinen, A. J., Hasan, J., Värri, A. O. & Himanen, S-L. J. 2005.
    EEG sleep spindle frequency differs between pure and diffuse spindles .
    In: Hamza, M. H. (Ed.). Proceedings of the Third IASTED International Conference on Biomedical Engineering, Innsbruck, Austria, 16-18 February 2005 pp. 387-391.

    Huupponen, E. J., Saastamoinen, A. J., Virkkala, J. T., Himanen, S-L. J., Hasan, J. & Värri, A. O. 2005.
    Determination of EEG sleep spindle frequency with DFT matching pursuit approaches .
    In: Hamza, M. H. (Ed.). Proceedings of the Third IASTED International Conference on Biomedical Engineering, Innsbruck, Austria, 16-18 February 2005 pp. 383-386.

    Huupponen, E., Saastamoinen, A., Joutsen, A., Virkkala, J., Alametsä, J., Hasan, J., Värri, A. & Himanen, S-L. 2005.
    Anteroposterior difference in EEG sleep depth measure is reduced in apnea patients .
    Journal of Medical Systems vol. 29, num. 5, pp. 527-538.

    Huupponen, E., Saastamoinen, A., Niemi, J., Virkkala, J., Hasan, J., Värri, A. & Himanen, S-L. 2005.
    Automated frequency analysis of synchronous and diffuse sleep spindles .
    Neuropsychobiology vol. 51, num. 4, pp. 256-264.

    Huupponen, E., Saastamoinen, A. & Värri, A. 2005.
    Sleep spindles in sleep bio-profiling .
    In: Lehenkari, J. & Häyrinen, K. (Eds.). SoTeTiTe 2005, Sosiaali- ja terveydenhuollon tietotekniikan ja tiedonhallinnan tutkimuspäivät, Osaavien keskusten verkoston julkaisuja vol. 4, pp. 10-14.

    Junnila, S., Akhbardeh, A., Värri, A. & Koivistoinen, T. 2005.
    An EMFi-film sensor based ballistocardiographic chair: performance and cycle extraction method .
    Proceedings of 2005 IEEE Workshop on Signal Processing Systems, Design and Implementation, SiPS 2005, Athens, Greece, 2-4 November 2005 pp. 373-377.

    Popescu, C., Barna, L. C., Koivuluoma, M. & Värri, A. 2005.
    Histogram based quantification of submental EMG .
    Proceedings of the 3rd European Medical & Biomedical Engineering Conference, IFMBE European Conference on Biomedical Engineering, EMBEC 2005, Prague, Czech Republic, 20-25 November 2005 vol. 11, 5 p.

    Alametsä, J., Huupponen, E., Saastamoinen, A., Värri, A., Joutsen, A., Hasan, J., Rauhala, E. & Himanen, S.-L. 2004.
    New spiking detection algorithm in sleep study .
    In: Sarantao, K. & Häyrinen, K. (eds.). SoTeTiTe 2004, Sosiaali- ja terveydenhuollon tietotekniikan ja tiedonhallinnan tutkimuspäivät, Osaavien keskusten verkoston julkaisuja num. 4/2004, s. 5-7.

    Alametsä, J., Värri, A., Koivuluoma, M. & Barna, L. 2004.
    The potential of EMFi sensors in herat activity monitoring .
    In: Zyvietz, C. (ed.). Proceedings of the 2nd OpenECG Workshop: Integration of the ECG into the EHR & Interoperability of ECG Device Systems, Berlin, Germany, 1-3 April 2004 s. 81-85.

    Huupponen, E., Himanen, S-L., Hasan, J. & Värri, A. 2004.
    Automatic quantification of light sleep shows differences between apnea patients and healthy subjects .
    International Journal of Psychophysiology vol. 51, num. 3, pp. 223-230.

    Junnila, S., Barna, L., Koivistoinen, T., Koivuluoma, M., Alametsä, J., Kööbi, T., Turjanmaa, V., Niittylahti, J. & Värri, A. 2004.
    Development of a wireless proactive ballistocardiograph chair .
    In: Linden, G. (ed.). Proceedings of the Proactive Computing Workshop PROW 2004, Helsinki, Finland, 25-26 November 2004 pp. 25 - 28.

    Junnila, S., Koivistoinen, T., Kööbi, T., Niittylahti, J. & Värri, A. 2004.
    A simple method for measuring and recording ballistocardiogram .
    In: Jan, J., Kozumplik, J. & Provanznik, I. (eds.). Analysis of Biomedical Signals and Images, Proceedings of 17th Biennial International EURASIP Conference Biosignal 2004, Brno, Czech Republic, 23-25 June 2004 s. 232-234.

    Koivistoinen, T., Barna, L., Alametsä, J., Junnila, S., Koivuluoma, M., Kööbi, T., Turjanmaa, V. & Värri, A. 2004.
    Ballistocardiograms from young adults in sitting position using EMFi sensors .
    Proceedings of the 31st Annual Meeting of Computers in Cardiology 2004, Chicago, Illinois, USA, 19-22 September 2004 5 p.

    Koivistoinen, T., Junnila, S., Värri, A. & Kööbi, T. 2004.
    A new method for measuring the ballistocardiogram using EMFi sensors in a normal chair .
    Proceedings of the 26th Annual Internatioal Conference of the IEEE Engineering in Medicine and Biology society, San Francisco, California, USA, 1-5 September 2004 4 p.

    Koivistoinen, T., Junnila, S., Värri, A. & Kööbi, T. 2004.
    Hemodynamic parameters compared to ballistocardiogram recorded in the sitting position .
    In: Linden, G. (ed.). Proceedings of the Proactive Computing Workshop PROW 2004, Helsinki, Finland, 25-26 November 2004 pp. 47-49.

    Koivuluoma, M., Barna, L. C., Alametsä, J. & Värri, A. 2004.
    Signal processing in ProHeMon project: objectives and first results .
    In: Linden, G. (ed.). Proceedings of the Proactive Computing Workshop PROW 2004, Helsinki, Finland, 25-26 November 2004 pp. 55-58.

    Koivuluoma, M., Barna, L., Koivistoinen, T., Alametsä, J., Junnila, S., Turjanmaa, V., Kööpi, E. & Värri, A. 2004.
    ProHeMon-projekti .
    In: Sarantao, K. & Häyrinen, K. (eds.). SoTeTiTe 2004, Sosiaali- ja terveydenhuollon tietotekniikan ja tiedonhallinnan tutkimuspäivät, Osaavien keskusten verkoston julkaisuja num. 4/2004, s. 37-39.

    Paiva, T., Penzel, T., Zulley, J., Binnie, C., Russel, M., Escourrou, P., Araujo, M. T., Fred, A., Värri, A., Spreng, M., Nielsen, K., Belo, C., rosa, A. & Guilleminault, C. 2004.
    The ENN project - a telematics experience in neurology .
    Somnologie, Sleep Research and Sleep Medicine vol. 8, num. 1, s. 3-13.

    Värri, A. 2004.
    ENV 14271, file exchange format for vital signs and its use in digital ECG archiving .
    In: Zyvietz, C. (ed.). Proceedings of the 2nd OpenECG Workshop: Integration of the ECG into the EHR & Interoperability of ECG Device Systems, Berlin, Germany, 1-3 April 2004 s. 27-28.

    Värri, A., Koivuluoma, M., Alametsä, J. & Ruotsalainen, U. 2004.
    Laitteisto elintoimintojen mittaamiseksi .
    Hyödyllisyysmalli FI 6295 26 s.

    Alametsä, J., Huupponen, E., Koivuluoma, M., Barna, L. & Värri, A. 2003.
    Testing a new sensor for the analysis of breathing and heart rate .
    Sleep Medicine, Abstract Book, 7th World Congress on Sleep Apnea, Helsinki, Finland, June 29th - July 3rd, 2003 vol. 4, num. S1, s. 1.

    Alametsä, J., Huupponen, E. & Värri, A. 2003.
    The usage of MXA2500U acceleration sensor in heart research .
    In: Huttunen, H., Gotchev, A. & Vasilache, A. (eds.), Proceedings of the 2003 Finnish Signal Processing Symposium, FINSIG'03, Tampere, Finland, 19 May 2003 num. 20, TICSP . s. 22-26.

    Huupponen, E., Himanen, S.-L., Hasan, J. & Värri, A. 2003.
    Automatic analysis of electro-encephalogram sleep spindle frequency throughout the night .
    Medical & Biological Engineering & Computing vol. 41, num. 6, s. 727-732.

    Huupponen, E., Himanen, S-L., Hasan, J. & Värri, A. 2003.
    Automatic analysis shows a difference in sleep depth of healthy controls and apnea patients .
    Sleep Medicine, Abstract Book, 7th World Congress on Sleep Apnea, Helsinki, Finland, June 29th - July 3rd, 2003 vol. 4, num. S1, s. 22.

    Huupponen, E., Himanen, S-L., Hasan, J. & Värri, A. 2003.
    Decomposition of sleep cyclisities by median filtering .
    Proceedings of 2003 IEEE - Eurasip Workshop on Nonlinear Signal and Image Processing, NSIP 2003, Grado-Trieste, Italy, 8-11 June 2003 4 s.

    Huupponen, E., Himanen, S-L., Hasan, J. & Värri, A. 2003.
    Sleep depth oscillations: an aspect to consider in automatic sleep analysis .
    Journal of Medical Systems vol. 27, num. 4, s. 337-345.

    Huupponen, E., Saastamoinen, A., Alametsä, J., Himanen, S-L. & Värri, A. 2003.
    Automatic analysis shows a difference in sleep depth of healthy controls and apnea patients .
    1st Nordic Workshop on Brain Imaging and Neuroinformatics, Abstracts, Finn-Medi Building, Tampere, Finland, 2 October 2003 1 s.

    Värri, A., Penzel, T., Jacobi, P., Cunha, J., Zywietz, C & Brown, N. 2003.
    An European biosignal data format prestandard .
    1st Nordic Workshop on Brain Imaging and Neuroinformatics, Abstracts, Finn-Medi Building, Tampere, Finland, 2 October 2003 1 s.

    Huupponen, E., Himanen, S-L., Värri, A., Hasan, J., Lehtokangas, M. & Saarinen, J. 2002.
    A study on gender and age differences in sleep spindles .
    Neuropsychobiology num. 45, s. 99-105.

    Huupponen, E., Himanen, S-L., Värri, A., Hasan, J., Saastamoinen, A., Lehtokangas, M. & Saarinen, J. 2002.
    Fuzzy detection of EEG alpha without amplitude thresholding .
    Artificial Intelligence in Medicine num. 24, s. 133-147.

    Koivuluoma, M., Alametsä, J. & Värri, A. 2002.
    Adxl202 kiihtyvyysanturin käyttö sydäntutkimuksessa .
    In: Nykänen, P. (eds)., SoTeTiTe 2002 Sosiaali- ja terveydenhuollon tietotekniikan ja tiedonhallinnan tutkimuspäivät, Tutkimuspaperit num. 3, Helsinki, Stakes . s. 73-80.

    Koivuluoma, M., Alametsä, J. & Värri, A. 2002.
    Using ADXL202 acceleration sensor in heart research .
    Proceedings of 12th Nordic-Baltic Conference on Biomedical Engineering, Reykjavik, Island, June 18-22, 2002 s. 122-125.

    Alametsä, J., Koivuluoma, M. & Värri, A. 2001.
    Mobile physiological signal measurement station .
    Proceedings of the International Federation of Medical & Biogical Engineering. IX Mediterranean Conference on Medical and Biological Engineering and Computing. Medicon 2001, June 12 - 15, 2001, Pula, Croatia s. 289 - 292.

    Hasan, J., Peter, JH., Kinnari, K., Pietarinen, A., Grote, A., Penzel, T., Värri, A., Laippala, P., Saastamoinen, A. & Cassel, W. 2001.
    Vigilance analysis with short segments .
    Somnologie Schlafforschung und Schlafmedizin Somnology Sleep Research and Sleep Medicine International Symposium on Sleep and Autonomous Function 20th Anniversary of the Marburg Sleep Lab Marburg March 29 - 31 , 2001 Chair Persons: J.H. Peter, T. Penzel Organisation: B. Knobi num. Abst. 8,

    Huupponen, E., Himanen, S.-L., Värri, A., Hasan, J., Lehtokangas, M. & Saarinen, J. 2001.
    Improving reliability in sleep spindle detection .
    In: Hamza, M.H. (ed). Proceedings of the IASTED International Conference on Signal Processing, Pattern Recognition, and Applications July 3-6, 2001, Rhodes, Greece ACTA Press . s. 16-20.

    Huupponen, E., Koivuluoma, M. & Värri, A. 2001.
    Erilaisten menetelmien vertailu NREM-unen kvantifoinnissa .
    Sosiaali- ja terveydenhuollon tietotekniikan ja tiedonhallinnan tutkimuksen päivät 4 s.

    Huupponen, E., Koivuluoma, M. & Värri, A. 2001.
    Quantification of the nrem sleep process with linear and non-linear features .
    In: Renfors, M. (ed)., Proceedings of URSI XXVI Convention on Radio Science and Second Finnish Wireless Communications Workshop, 23-1-24 October 2001, Tampere, Finland 2 s.

    Huupponen, E., Lehtokangas, M., Saarinen, J., Värri, A., Saastamoinen, A., Himanen, S-L. & Hasan, J. 2001.
    EEG Alpha Activity Detection by Fuzzy Reasoning .
    Proceedings of Joint 9th IFSA World Congress and 20th NAFIPS International Conference, July 25-28, 2001, Vancouver, British Columbia, Canada s. 411-416.

    Huupponen, E., Värri, A., Himanen, S.-L., Hasan, J., Lehtokangas, M. & Saarinen, J. 2001.
    Optimization of sigma amplitude threshold in sleep spindle detection .
    J. Sleep Res. s. 327-334.

    Klösch, G., Kemp, B., Penzel, T., Schlög, A., Rappelsberger, P., Trenker, E., Gruber, G., Zeithofer, J., Saletu, B., Herrmann, W. M., Himanen, S. L., Kunz, D., Barbanoj, M. J., Röschke, J. Värri, A. & Dorffner, G. 2001.
    The SIESTA Project Polygraphic and Clinical Database .
    IEEE Engineering in Medicine and biology vol. 20, num. 3, s. 51-57.

    Koivuluoma, M., Alametsä, J. & Värri, A. 2001.
    EMFi as a physiological signal sensor, first results .
    In: Renfors, M. (ed)., Proceedings of URSI XXVI Convention on Radio Science and Second Finnish Wireless Communications Workshop, 23-24 October 2001, Tampere, Finland 2 s.

    Koivuluoma, M., Huupponen, E., Värri, A., Olejarczyk, E. & Klonowski, W. 2001.
    Comparison of some linear and non-linear methods in the quantification of nrem sleep process .
    NOLTA 2001, 2001 International Symposium on Nonlinear Theory and its Applications, The 7th R.I.E.C. Internantional Symposium, October 28 - November 1 2001, Miyagi Zao Royal Hotel, Miyagi, Japan vol. 2, s. 411-414.

    Penzel, T., Kemp, B., Klösch, G., Schlögl, A., Hasan, J., Värri, A. & Korhonen, I. 2001.
    Acquisition of Biomedical Signals Databases .
    IEEE Engineering in Medicine and Biology Magazine vol. 20, num. 3, s. 25-32.

    Rappelsberger, P., Trenker, E., Rothmann, Ch., Gruber, G., Sykacek, P.,Roberts, ST., Klöch, G., Zeitlhofer, J., Anderer,, P., Saletu, B., Schlögl, A.Värri, A., Kemp, B.,Penzel, Th., Herrmann, W., Hasan, J., Barbanoj, J., Röschke, J., Kunz, D. & Dorffner, G. 2001.
    Das Projekt SIESTA .
    Klinische Neurophysiologie, Zeitschrift für Funktionsdiagnostik des Nervensystems num. 32, s. 76-88.

    Saastamoinen, A., Lehtokangas, M., Värri, A. & Saarinen, J. 2001.
    Biomedical Applications of Radial Basis Function Networks .
    In: Howlett, R. et al. (eds.). Radial Basis Function Networks 2; New Advances in Design Physica-Verlag . s. 215-268.

    Värri, A. 2001.
    Uusi biosignaalien tallennusformaatti .
    Sosiaali- ja terveydenhuollon tietotekniikan ja tiedonhallinnan tutkimuksen päivät s. 1 - 4.

    Värri, A., Kemp, B., Penzel, T. & Schlägl, A. 2001.
    Standards for Biomedical Signal Databases .
    IEEE Engineering in Medicine and Biology Magazine vol. 20, num. 3, s. 33-37.

    Värri, A., Koivuluoma, M. & Morvan C. 2001.
    A Computer-assisted visual sleep scoring program .
    In: Paiva, T. Penzel, T. (eds). European Neurological Network IOS Press . s. 285-297.

    Dorfner, G., Sykacek, P., Roberts, S., Schlögl, A., Värri, A., Rappelsberger, P., Anderer, P., Klösh, G., Saletu, B., Barbanoj, M.J., Herrmann, W., Himanen, S.-L., Kemp, B., Penzel, T. & Röschke, J. 2000.
    Continuous Sleep Process and Subjective Sleep Quality - First results from the Siesta project .
    Journal of Sleep Research, 15th Congress fo the European Sleep Research Society num. P 110,

    Härmä, M., Sallinen, M., Stenberg, T., Hublin, C., Telakivi T., Värri, A. & Partinen, M. 2000.
    Vireyden ja toimintakyvyn ylläpito tietointensiivisessä työssä .
    Työ ja ihminen, työympäristötutkimuksen aikakauskirja vol. 14, num. 2, s. 161 - 168.

    Huupponen, E., Himanen, S-L., Värri, A., Hasan, J., Lehtokangas, M. & Saarinen, J. 2000.
    Effect of visual scorings on development of automated methdos for sleep EEG analysis .
    Terveydenhuollon XXVI atk-päivät 29 -30.5.2000

    Huupponen, E., Värri, A., Hasan, J., Himanen, S-L., Lehtokangas, M. & Saarinen, J. 2000.
    Comparison of Fuzzy Reasoning and Autoassociative MLP in Sleep Spindle Detection .
    In: Gabbouj, M. et al. (eds.). Proceedings, EUSIPCO 2000, September 4-8, 2000, Tampere, Finland vol. 1, Tampere, s. 55-58.

    Huupponen, E., Värri, A., Himanen, S-L., Hasan, J. Lehtokangas, M. & Saarinen J. 2000.
    Autoassociative MLP in Sleep Spindle Detection .
    Journal of Medical Systems vol. 24, num. 3, Plenum Publishing Corpo . s. 183 - 193.

    Kinnari, K., Pietarinen, A., Groete L., Penzel, T., Värri, A., Laippala, P., Saastamoinen, A., Gassel, W. & Hasan, J. 2000.
    Vigilance stages and performance in OSAS patients in a monotonous reaction time task .
    Clinical Neurophysiology vol. 111, s. 1130-1136.

    Koivuluoma, M., Värri, A. & Flexer, A. 2000.
    Modelling sleep with gaussian mixture model based on eye movements and delta-activity .
    In: Gabbouj, M. & Kuosmanen, P. (eds). Signal Processing X Theories and Applications, Proceedings of EUSIPCO 2000, tenth European Signal Processing Conference, 4-8 September 2000, Tampere, Finland vol. 1, Tampere, s. 35-38.

    Penzel, T., Guilleminault, C., Paiva, T., Värri, A., Mayer, G. & 2000.
    The European Neurological Network (ENN) Supports Health Care in Sleep, Headache and Epilepsy .
    ISTEP 2000, International Symposium on Telemedicine and Teleeducation in Practice, Symposium Proceedings, 24 - 24 March, 2000, Kosice, Slovak Republik s. 209 - 213.

    Brown, N., Gibaud, B., Arvanitis, T., Hinchley, A., Britton, K., Värri, A. & Todd-Pokropek, A. 1999.
    Navigation and Performance Presentation of Multimedia Diagnostic Imaging Reports .
    In: Lemke, H.U. et al. (eds). Proceedings of the 13th International Congress and Exhibition, CARS´99, Computer Assisted Radiology and Surgery, Paris, France, June 23-26, 1999. Excerpta Medica International Congress Series 1191 s. 479-483.

    Conradt, R., Brandenburg, U., Penzel, T., Hasan, J., Värri, A. & Peter, J.H. 1999.
    Vigilance transitions in reaction time test: a method of describing the state of alertness more objectively .
    Clinical Neurophysiology vol. 110, s. 1499-1509.

    Dobrova, V., Kolpakov, F., Värri, A. & Melnik, V. 1999.
    Estimation of Time Diagnostic Parameters of Blood Pressure Variation in Frequency Domain .
    In: Saarnisaari, H. & Juntti, M. (eds.). Proceedings of 1999 Finnish Signal Processing Symposium FINSIG'99, Oulu, May 31, 1999 s. 189-193.

    Huupponen, E., Värri, A., Hasan, J., Himanen, S-L., Lehtokangas, M. & Saarinen, J. 1999.
    Fuzzy reasoning based sleep spindle detection .
    In: Saarnisaari, H. & Juntti, M. (eds.). Proceedings of the 1999 Finnish Signal Processing Symposium, Oulu, Finland, May 31, 1999 Oulu, Oulun yliopistopaino . s. 94-97.

    Huupponen, E., Värri, A., Hasan, J., Himanen, S-L., Lehtokangas, M. & Saarinen, J. 1999.
    Sleep spindle detection with fuzzy rules .
    SOTETITE, Sosiaali- ja terveydenhuollon tietotekniikan tutkimuspäivät, 17-18.8.1999, Turku, Finland

    Koivuluoma, M., Värri, A. & Flexer, A. 1999.
    EOG ja EMG signaalien analysointi SIESTA-projektissa .
    SOTETITE, Sosiaali- ja terveydenhuollon tietotekniikan tutkimuspäivät, 17-18.8.1999, Turku, Finland

    Paiva, T., Guilleminault, C., Penzel, T., Zulley, J., Värri, A., Fred, A. & Teles-Araújo, M. 1999.
    The European Neurological Network .
    In: Schulz, H., Parmeggiani, P. L. & Chase, M. H. (eds). Third International Congress of the World Federation of Sleep Research Societies (WFSRS), Abstracts, Sleep Research Online, 1999, vol. 2 (Supplement 1) s. 583.

    Penzel, T., Dorffner, G., Hasan, J., Kemp, B., Schlögl, A., Värri, A., Barbanoj, M., Herrmann, W., Röschke, J., Rappelsberger, P., Roberts, S., Nielsen, KD., Saletu, B. & Zeitlhofer, J. 1999.
    A new standard of modelling sleep based on polysomnograms .
    ISCB/GMDS 99, 20th Annual Conference of the International Society for Clinical Biostatics, 14.-17. September 1999, 44. Jahrestagung der Deutschen Gesellschaft fuer Medizinische Informatik, Biometrie und Epidemiologie, 13.-16. September 1999, Session: Medical signal and image processing -1, Sept. 13 s. 329.

    Penzel, T., Dorffner, G., Himanen, S.L., Kemp, B., Schlögl, A., Roberts, S., Värri, A., Barbanoj, M., Herrmann, W., Rappelsberger, P., Saletu, B. & Zeitlhofer, J. 1999.
    A Multi-Center Study to Develop a New Standard of Computerbased Sleepanalysis .
    The Physiologist, 1999 APS Conference, Determinants of Vigilance: Interaction Between the Sleep and Circadian Systems, October 19-22, 1999, Ft. Lauderdale, Florida vol. 42, num. 5, s. A-11.

    Schlögi, A., Anderer, P., Barbanoj, M.-J., Klösch, G., Gruber, G., Lorenzo, J L., Filz, O., Koivuluoma, M., Rezek, I., Roberts, S. J., Värri, A., Rappelsberger, P., Pfurtscheller, G. & Dorffner, G. 1999.
    Artefact processing of the sleep EEG in the "siesta"-project .
    Proceedings of European Medical and Biological Engineering Conference - EMBEC 1999, Vienna, Austria, 4-7 November 1999 3 p.

    Schlögl, A., Kemp, B., Penzel, T., Kunz, D., Himanen, S-L., Värri, A., Dorffner, G. & Pfurtscheller, G. 1999.
    Quality control of polysomnographic sleep data by histogram and entropy analysis .
    Clinical Neurophysiology num. 110, s. 2165 - 2170.

    Värri, A. 1999.
    Work for a new European Standard on Biosignal Storage Format begins .
    Medical & Biological Engineering & Computing, May 1999 num. 36, s. N15.

    Värri, A., Brown, N.J.G., Gibaud, B., Arvanitis, T.N., Hinscley, A., Britton, K.E. & Todd-Pokropek, A. 1999.
    Aspects of Multimedia Diagnostic Service Reports .
    International Seminar on Multimedia, Data Integration, Medical Databases, Second Announcement, Warsaw, October 18-23, 1999 s. 61-62.

    Kemp, B., Penzel, T., Värri, A.O., Sykacek, P., Roberts, S.J. & Nielsen, K.D. 1998.
    EDF: A Simple Format for Graphical Analysis Resluts from Polygraphic Siesta Recordings .
    Journal of Sleep Research, 14th European Congress on Sleep Research, Madrid, Spain, 9-12 September, 1998 vol. 7, num. 2, Blackwell Science Ltd. . s. 132.

    Koivuluoma, M., Värri, A., Siren, S., Huupponen, E., Morvan, C., Trouselle, D., Henry, J., Martins, N., Rosa, A., Conradt, R. & Penzel, T. 1998.
    WSCORE - Computer Program for Telematic Sleep Medicine .
    Journal of Sleep Research, 14th European Congress on Sleep Research, Madrid, Spain, 9-12 September, 1998 vol. 7, num. Suppl. 2, s. 138.

    Saastamoinen, A., Pietilä, T., Värri, A., Lehtokangas, M. & Saarinen, J. 1998.
    Waveform detection with RBF network - Application to automated EEG analysis .
    Neurocomputing vol. 20, s. 1-13.

    van de Velde, M., van den Berg-Lenssen, M.M.C., van Boxtel, G.J.M., Cluitmans, P.J.M., Kemp, B., Gade, J., Thomsen, C.E. & Värri, A. 1998.
    Digital Archival and Exchange of Events in a Simple Format for Polygraphic Recordings with Application in Event Related Pontential Studies .
    Electroencephalography and clinical Neurophysiology vol. 106, num. 6, s. 547-551.

    Hirvonen, K., Hasan, J., Häkkinen, V., Värri, A. & Loula, P. 1997.
    The detection of drowsiness and sleep onset periods from abulatory recorded polygraphic data .
    Electroencephalography and clinical Neurophysiology vol. 102, Elsevier Science Ireland Ltd. . s. 132-137.

    Kujala, P., Eriksson, J.-T., Värri, A. & Saarinen, J. 1997.
    Recognition of Epileptic spikes using a multilayer-perceptron neural network .
    World Congress on Medical Physics and Biomedical Engineering, Nice, France, September 14-19, 1997, Medical & Biological Engineering & Computing vol. 35, num. Suppl. Part 1, s. 558.

    Kujala, P., Värri, A., Saarinen, J. & Eriksson, J.-T. 1997.
    Epileptic spike detection with neural networks .
    Proceedings of FINSIG'97 Conference, May 22, Pori, Finland, 1997 s. 92-96.

    Nielsen, K.D., Penzel, T., Värri, A., Guilleminault, C. & Paiva, T. 1997.
    Sleep, headache and epilepsy reference database with internet access - the European neurological network project .
    World Congress on Medical Physics and Biomedical Engineering, Nice, France, September 14-19, 1997, Medical & Biological Engineering & Computing vol. 35, num. Suppl. Part 2, s. 1303.

    Pietarinen, A., Peter, J.H., Kinnari, K., Grote, L., Penzel, T., Värri, A., Laippala, P., Cassel, W. & Hasan, J. 1997.
    Vigilance Stages and Performance of Osas Patients in a Monotonous Reaction Time Task .
    Somnologie, 5th World Congress on Sleep Apnea, Marburg, Germany, September 17-20, 1997 vol. 1, num. Suppl. 2, s. 28.

    Saastamoinen, A., Pietilä, T., Värri, A., Lehtokangas, M. & Saarinen, J. 1997.
    Neural Network Based Method for Detecting Artefacts in the EEG .
    Suomen tilastoseuran vuosikirja 1996. The Yearbook of the Finnish Statistical Society 1996. Osa-Part I. Neural Networks and Statistics, Tilastopäivät - Annual Conference of Statisticians, 7-8.11.1996 s. 45-63.

    Värri, A., Hellmann, G., Penzel, T. & Nielsen, K.D. 1997.
    A new, standard biosignal storage format .
    World Congress on Medical Physics and Biomedical Engineering, Nice, France, September 14-19, 1997, Medical & Biological Engineering & Computing vol. 35, num. Suppl. Part 2, s. 1302.

    Huupponen, E., Värri, A., Hasan, J., Saarinen, J. & Kaski, K. 1996.
    Multi-Channel Arousal Detection using Multilayer Perceptron Network .
    In: Bulsari, A.B., Kallio, S. & Tsaptsinos, D.(ed.), Proceedings of the International Conference on Engineering Applications of Neural Networks (EANN´96), 17-19 June 1996, London, England Lontoo, Englanti, s. 253-256.

    Huupponen, E., Värri, A., Hasan, J., Saarinen, J. & Kaski, K. 1996.
    Sleep Arousal Detection with Neural Network .
    Medical & Biological Engineering & Computing. Proceedings of the 1st International Conference on Bioelectromagnetism, June 9-13, 1996, Tampere vol. 34, num. suppl. 1, part 2, s. 219-220.

    Penzel, T., Fuchs, K., Hassing, K., Hellman G., Macerata, A., Nielsen, K., Värri, A. & Zywiez, C. 1996.
    Scenarios on Vital Signs and Derivation of a Domain Information Model .
    Medical & Biological Engineering & Computing. Proceedings of the 10th Nordic-Baltic Conference on Biomedical Engineering, June 9-13, 1996 vol. 34, num. suppl. 1, part 1, International Federation for Medical & Biological Engineering . s. 119-120.

    Saastamoinen, A., Pietilä, T., Värri, A., Saarinen, J. & Kaski, K. 1996.
    Neural Network Based Method for Tracking Artefactual Patterns in EEG .
    Medical & Biological Engineering & Computing, The 1st International Conference on Bioelectromagnetism, June 9-13, 1996, Tampere, Finland vol. 34, num. Supp. 1,Part 2, Tampere, s. 243-244.

    Värri, A., Hasan, J. & Astola, J. 1996.
    Automatic Analysis of Sleep and Epilepsy State of the Art - Present and Future .
    ENN, First workshop on ENN, 31. Jan- 3.Feb.1996, Treysa, Germany, Program and Abstracts s. 1-4.

    Värri, A., Hellmand, G., Penzel, T., Nielsen, K., Macerata, A., Gottlieb, L., Hassing, K. & Zywietz, C. 1996.
    Object Oriented Design of a New, Standard File Exchange Format for Vital Signs .
    Medical & Biological Engineering & Computing. Proceedings of the 10th Nordic-Baltic Conference on Biomedical Engineering vol. 34, num. suppl. 1, part 1, Journal of the International Federation for Medical & Biological Engineering . s. 407-408.

    Värri, A., Hirvonen, K., Häkkinen, V., Hasan, J. & Loula, P. 1996.
    Nonlinear eye movement detection method for drowsiness studies .
    International journal of bio-medical computing vol. 43, Elsevier . s. 227-242.

    Asano, A., Värri, A., Takano, N., Hasan, J., Loula, P. & Häkkinen, V. 1995.
    Application of nonlinear filters to analysis of sleep process .
    Proceedings of the 1995 IEICE General Conference, 27-30.3.1995, Fukuoka, Japan Japan, The Institute of Electronics, Information and Communication Eng. . s. 143.

    Asano, A., Värri, A., Takano, N., Hasan, J., Loula, P. & Häkkinen, I. 1995.
    Application of nonlinear filters to analysis of sleep process .
    IEEE Workshop on Nonlinear Signal and Image Processing, Volume I of II, June 20-22, 1995, Noes Marmaras, Halkidiki, Greece s. 491-494.

    Grote, L., Fus, E., Värri, A., Becker, C., Janicki, J., Peter, J.H. & Wichert, P. v. 1995.
    Nocturnal hypertension and sleep apnea: Apnea-induced blood pressure increases during NREM and REM sleep (Nächtliche Hypertonie und Schlafapnoe: Apnoe-induzierte Blutdruckanstiege im NREM- und REM-Schlaf, Nieren- und Hochdruckkrankheiten) .
    Nieren- und Hochdruckkrankheiten vol. 24, num. 1, pp. 16-19.

    Ternonen, M., Vuorimaa, P., Värri, A. & Hasan, J. 1995.
    The comparison of Fussy SOM and MLP in vigilance analysis based on EEG, EOG and EMG .
    Neural network-based EEG-analyses, International Workshop, Graz, Itävalta, June 29-30

    Tervonen, M., Vuorimaa, P., Värri, A. & Hasan, J. 1995.
    Vigilance classification using neural and fuzzy methods .
    3rd European Conference on Engineering and Medicine, 1995, Firenze, Italy, May

    Värri, A. 1995.
    35 years of EEG spike detection .
    Biomed-1/Anndee, Workshop on Enhancement of EEG-based diagnosis of neurological and psychiatric disasdos by neural networks

    Värri, A. 1995.
    Challenges for the Computerized Analysis of Sleep .
    Workshop on Enhancement of EEG-based diagnosis of neurological and psychiatric disasdos by neural networks, University of Giessen, Germany, 24.2.1995

    Värri, A. 1995.
    Filtering techniques .
    BIOMED-1/ANNEE Workshop on Enhancement of EEG-based diagnosis of neurological and psychiatric disorers by neural networks, Imperial College, Sept. 29-30, 1995 London,

    Värri, A. 1995.
    Terveydenhuollon tietojenkäsittelystandardit työn alla .
    Lääketieteellisen fysiikan ja tekniikan yhdistyksen jäsenlehti num. 4, s. 3-4.

    Värri, A., Kemp, B., Rosa, A. C., Nielsen, K. D., Gade, J., Penzel, T., Hasan, J., Hirvonen, K., Häkkinen, V., Kamphuisen, H. A. C. & Mourtazaev 1995.
    Multi-centre comparison of five eye movement detection algorithms .
    J Sleep Res vol. 4, European Sleep Research Society . s. 119-130.

    Värri, A., Penzel, Th., Brandenburg, U. & Peter, J. H. 1995.
    Interactive computer program for the analysis of cardiovascular polysomnographic recordings .
    Pneumologie vol. 49, num. Marz, s. 108-112.

    Pietilä, T., Vapaakoski, S., Nousiainen , U., Värri, A., Frey, H., Häkkinen , V. & Neuvo, Y. 1994.
    Evaluation of a compurized system for recognition of epileptic activity during long-term EEG monitoring .
    Electroencephalography Clinical Neurophysiology vol. 90, s. 438-443.

    Pulli, K., Härmä, M., Hasan, J., Värri, A. & Loula, P. 1994.
    Autonomic activity as measured by SCSB and EEG delta activity during sleep .
    12th Congress of the European Sleep Research Society, 22.-27.5.1994, Firenze, Italy, Journal of Sleep Research, Vol. 3, Suppl. 1, 1994 Firenze, Italy, s. 212.

    Pulli, K., Härmä, M., Hasan, J., Värri, A. & Loula, P. 1994.
    The relationship between EEG delta activity and autonomic activity as measured by SCSB during daytime sleep .
    Journal of Sleep Research vol. 3, s. 106-110.

    Värri A., Grote L., Penzel T., Cassel , w. Peter, J. H. & Hasan, J. 1994.
    A new method to study blood pressure, heart rate and EEG as a function of reaction time .
    Methods of Information in Medicine, Special Issue on Biosignal Interpretation (IMIA/IFBME) vol. 33, num. 1, s. 64-67.

    Häkkinen, V., Hirvonen, K., Hasan, J., Kataja, M., Värri, A., Loula, P. & Eskola, H. 1993.
    The effect of small differences in electrode position on EOG vigilance data .
    Electroenceph Clin Neurophysiol vol. 86, s. 294-300.

    Hasan, J., Hirvonen, K., Värri, A., Häkkinen, V. & Loula, P. 1993.
    Validation of computer analysed polygraphic patterns during drowsiness and sleep onset .
    Electroencephalogr. Clin. Neurophysiol. vol. 87, s. 117-127.

    Neejärvi, J., Värri, A., Fotopoulos, S. & Neuvo, Y. 1993.
    Weighted FMH filters .
    Journal Signal Processing vol. 31, num. 2, s. 181-190.

    Penzel, T., Brandenburg, U., Peter, J . H., Värri, A. & von Wichert, P. 1993.
    Kontinuerliche Spektralanalyse zur Erfassung apnoebezogener Blutdruckschwankungen .
    Proceedings of the Joint Annual Congress of the German, Autrian and Swiss Soc ieties of Biomedical Technology, 16.-18.9.1993, Graz, Austria, Biomedizinisch e Technik vol. 38, num. Ergänzungsband, s. 111-112.

    Penzel, T., Grote, L., Peter, J. H., Värri, A., Voigt, K. H. & von Wichert, P. 1993.
    Blood pressure and heart rate responses on reaction-time test under conditions of monotology .
    Proceedings of the Annual Conference of the German Society of Physiology, Feb ruary 1993, Munchen, Plugers Archiv European Journal of Physiology vol. 422, num. Suppl. 1, s. 103.

    Värri, A. 1993.
    Muissa kaupungeissa on yliopisto, Marburg on yliopisto .
    Anturi 18.3.1993 num. 3, s. 8-9.

    Värri, A., Elo, P., Saarinen, J., Loula, P., Pietilä, T., Vapaakoski, S. & Kaski, K. 1993.
    Pattern recognition of the EEG in epilepsy with neural networks .
    Abstact book of the Second International Hans-Berger-Congress Quantitative an d Topological EEG and MEG Analysis, Jena, Germany, 8.-11.9.1993, supplemt

    Värri, A., Grote, L., Penzel, T., Cassel, W., Peter, J. H. & Hasan, J. 1993.
    A new method to study blood pressure heart rate and EEG as a function of reaction time .
    Proceedings of the IMIA-IFBME Working Conference on Biosignal Interpretation Rebild Bakker, Aalborg, Denmark, 25.-27.8.1993 s. 62-65.

    Värri, A. & Penzel, T. 1993.
    Intelligent biomedical signal processing - Application to tape recorder noise .
    Proceedings of the Joint Congress of the German, Austrian and Swiss Societie s of Biomedical Technology, 16.-18.9.1993, Graz, Austria, Biomedizienische Te chnik vol. 38, num. Ergänzungsband, s. 283-284.

    Värri, A., Penzel, T., Brandenburg, U . & Peter, J. H. 1993.
    Interactive computer program for the analysis of cardiovascular polysomnographic recordings .
    Annual meeting of the work group Nocturnal Breathing and Circulation Disorder s of the German Society of Pneumology, Nordernay, Germany, 18.-20.3.1993

    Elo, P., Saarinen, J., Värri, A., Nieminen, H. & Kaski, K. 1992.
    Classification of Epileptic EEG by Using Self-Organized Maps .
    10th Progress Report Meeting and Annual Meeting of the Finnish Society for Me dical Physics and Medical Engineering. Helsinki University of Technology, Fin land, March 1992 s. 15-18.

    Elo, P., Saarinen, J., Värri, A., Nieminen, H. & Kaski, K. 1992.
    Classification of Epileptic EEG by Using Self-Organizing Maps .
    Proceedings of the 1992 International Conference on Artificial Neural Networks, ICANN'92. Eds. Aleksander, I. & Tayler, J., Artificial Neural Networks 2, Vol 2, Brigton, 4.-7.9.1992 Amsterdam, Elsevier . s. 1147-1150.

    Elo, P., Saarinen, J., Värri, A., Nieminen, H. & Kaski, K. 1992.
    Classification of Epileptic EEG by Using Self-Organizing Maps .
    In: Hyttinen, J., Patomäki, L. & Helistö, P. Proceedings of the 10th Progress Report Meeting and Annual Meeting of Finnish Society for Medical Engineering, Helsinki 26.-27.3.1992. Institute of Biomedical Engineering, Report TKK-F-B num. 145, Otaniemi, Helsinki University of Technology . s. 23-26.

    Kemp, B., Värri, A., Rosa, A. C., Nielsen, K. D. & Gade, J. 1992.
    A Simple Format for Exchange of Digitized Polygraphic Recordings .
    Electroencephalography & Clinical Neurophysiology vol. 82, s. 391 - 393.

    Kulju, H. & Värri, A. 1992.
    Procede et Appareil de Comptage d'Objects dans une Zone Donnee .
    Patentti No. 8707301, 21.2.1992 num. 2599531,

    Loula, P., Värri, A., Hasan, J. & Hirvonen, K. 1992.
    Vigilance analysis by using VIRTU-method .
    10th Progress Meeting and Annual Meeting of the Finnish Siciety for Medical P Physics and Medical Engineering. Helsinki University of Technology, Finland, March 1992 s. 23-26.

    Pietilä, T., Vapaakoski, S., Nousiainen , U. & Värri, A. A. 1992.
    Method for Evaluation of Different EEG Monitoring Systems .
    AES Proceedings, Epilepsia vol. vol 33, num. Suppl. 3, s. 12.

    Stampi, C., Hasan, J., Hirvonen, K., Värri, A. & Loula, P. 1992.
    State variability as an index of drowsiness: Automatic vigilance analysis in truck drivers .
    11th Congress of the European Sleep Research Society, Helsinki, Finland, July 5-10, 1992. Journal of Sleep Research p. 217.

    Värri, A. 1992.
    Algorithms and systems for the analysis of long-term physiological signals .
    Tampereen teknillinen korkeakoulu, Julkaisuja num. 99, Tampere, 211 s.

    Värri, A., Häkkinen, V., Hasan, J., Hirvonen, K. & Loula, P. 1992.
    R-R interval changes with lowering of vigilance .
    11th Congress of the European Sleep Research Society, Helsinki, Finland, July 5-10, 1992. Journal of Sleep Research p. 239.

    Värri, A., Hirvonen, K., Hasan, J., Loula, P. & Häkkinen, V. 1992.
    A Computerized Analysis System for Vigilance Studies .
    Computer Methods and Programs in Biomedicine

    Värri, A., Neejärvi, J. & Neuvo, Y. 1992.
    A New Class of Digital Filters with Applications in Biomedical Signal Processing .
    Proc. of VII Mediterranean Conference on Medical and Biological Engineering, (MEDICON'92), July 5-10, 1992

    Värri, A., Neejärvi, J. & Neuvo, Y. 1992.
    A New Class of Filters to Remove Artifacts from Physiological Signals .
    Proc. of EUSIPCO-92, 6th European Signal Processing Conference, Brussels, Belgium, August 24-27, 1992 s. 1741 - 1744.

    Frey, H., Värri, A., Loula, P. & Neuvo, Y. 1991.
    What mathemathical algorithms should be used for the adaptive segmentation of the long-term EEG recordings in epilepsy .
    19th Int.Epilepsy Congress, Rio Janeiro, Brazil, 14-19.10.1991

    Häkkinen, V., Hirvonen, K., Hasan, J. , Kataja, M., Värri, A., Loula, P. & Eskola, H. 1991.
    Effect of small differences in electrode positions on EOG vigilance signals (Abstract) .
    Sleep Congress, Cannes, 1991

    Häkkinen, V., Hirvonen, K., Hasan, J., Kataja, M., Värri, A., Loula, P. & Eskola, H. 1991.
    Effects of small differences in electrode positions on EOG vigilance signals .
    Founding Congress of the World Federation of Sleep Research Societies

    Hasan, J., Hirvonen, K., Värri, A., Loula, P. & Häkkinen, V. 1991.
    Computerized Vigilance Analysis Using Adaptive Segmentation .
    Nordiska sömnforskningskongressen, Hverageroi, Island, 12-15.6.1991

    Hasan, J., Hirvonen, K., Värri, A., Loula, P., Häkkinen, V. & Frey, H. 1991.
    Preliminary evaluation of computerized vigilance analysis by using adaptive segmentation .
    Founding Congress of the World Federation of Sleep Research Societies, Cannes, France, 21-25.9.1991

    Hirvonen, K., Hasan, J., Häkkinen, V., Värri, A. & Loula, P. 1991.
    Automatic vigilance analysis & scoring system for ambulatory recordings .
    Founding Congress of the World Federation of Sleep Research Societies, Cannes, France, 21-25.9.1991

    Kemp, B., Värri, A., Rosa, A., Nielsen, K., Gade, J. & Penzel, T. 1991.
    Analysis of brain synchronization based on noise-driven feedback models .
    IEEE Conference on Biomedical Engineering, Orlando, USA, 31.10-3.11.1991

    Krajca, V., Petranek, S., Patakova, I. & Värri, A. 1991.
    Automatic Identification of Significant Graphoelements in Multichannel EEG Recordings by Adaptive Segmentation and Fuzzy Clustering .
    Int.J.Bio-Medical Computing vol. 28, s. 71-89.

    Krajca, V., Petranek, S., Värri, A. & Frey, H. 1991.
    On-line multichannel adaptive segmentation as a basement of long-term EEG processing .
    IEEE International Conference on Biomedical Engineering, Orlando, USA, 31.10-3.11.1991

    Värri, A., Häkkinen, V., Hasan, J. & Loula, P. 1991.
    A New Nonlinear EOG Processing method for Vigilance Studies .
    1st European Conference on Biomedical Engineering,Nice,France,17-20.2.1991 s. 334-335.

    Frey, H., Värri, A., Krajca, V., Loula, P., Melkinen, H., Häkkinen, V., & Neuvo, Y. 1990.
    Comparison of Different Mathematical Algorithms Used for the Adaptive Segmentation of the Long Term EEG Recording .
    5th European Congress of Clinical Term EEG Recording, 5th European Congress of Clinical Neurophysiology, Paris, France, 9-12 Sept. 1990 s. 61.

    Hasan, J., Värri, A., Loula, P. & Häkkinen, V. 1990.
    Computer aided interactive vigilance analysis by using polygraphic recordings .
    10th Congress of The European Sleep Research Society, Strasbourg, 20-25.5. 1990, (Abstract book) p. 431.

    Värri, A., Häkkinen, V., Hasan, J. & Loula, P. 1990.
    Automatic EOG Processing in a Vigilance Analysis systems .
    XIII Annual Joint Meeting of Electroencephalography and Clinical Neurophysiology, Prague, 14.-17.5. 1990, Proceedings

    Värri, A., Häkkinen, V., Hasan, J. & Loula, P. 1990.
    Eye Movement detection for Automatic Vigilance Analysis .
    Horne J. (Ed.) Sleep`90, Pontenagel Press, Bochum 1990 s. 82-84.

    Värri, A., Häkkinen, V., Hasan, J., & Loula, P. 1990.
    Eye movement detection for automatic vigilance analysis .
    10th Congress of The European Sleep Research Society, Strasbourg, 20-25.5.1990 (Abstract book) p. 430.

    Värri, A., Hasan, J., Loula, P. & Häkkinen, V. 1990.
    A computer-aided interactive vigilance analysis system (Abstract) .
    IV Nordiska sömnforskningskongressen, Turku, Finland, 30-31.1990 p. 13.

    Yli-Hankala, A., Värri, A., Jäntti, V. & Heikkilä, H. 1990.
    Correlation between the EEG and Heart Rate Variation in Deep Entflurane Anaesthesia .
    Acta Anaesthesia Scandinavica, 1990 vol. Vol, num. 34, pp. 138-143.

    Frey, H., Häkkinen, V., Korpinen, L., Värri, A., Loula, P., Saranummi, N. & Neuvo, Y. 1989.
    Long-term EEG recording in epilepsy and its automatic analysis .
    XXXI International Congress of Physiological Sciences, Helsinki, Finland, 9.-14.7.1989, Abstracts s. 315.

    Frey, H., Häkkinen, V., Loula, P., Värri, A., Saranummi, N. & Neuvo, Y. 1989.
    Long-term video recording of EEG in epilepsy and automatic real-time analysis .
    The First Vaajasalo International Epilepsy Symposium, Vaajasalo, Finland, 17.-18.5.1989, Abstracts

    Frey, H., Loula, P., Värri, A., Häkkinen, V., Saranummi, N. & Neuvo, Y. 1989.
    Intensive monitoring of the epileptic discharge using automatic real-time analysis .
    The 18th International Epilepsy Congress, New Delhi, India, October 17-22, 1989, Abstracts s. 96.

    Kulju, H. & Värri, A. 1989.
    Method of and apparatus for counting objects .
    Pat.US num. 4 800 386, USA, United States Patent Office .

    Loula, P., Frey, H., Häkkinen, V., Värri, A., Saranummi, N. & Neuvo, Y. 1989.
    Automatic real-time analysis of the long-term EEG .
    XIVth World Congress of Neurology, New Delhi, India, October 22-27, 1989, Abstracts

    Nieminen, A., Neuvo, Y., Värri, A. & Mitra, U. 1989.
    Algorithms for real-time trend detection .
    Signal Processing vol. 18, num. 9, Elsevier Science Publishers B.V. . s. 1-15.

    Värri, A. 1989.
    A method to improve the detection of eye movements .
    In: Jarske, Tiina (toim.) URSI/IEEE, XV Convention on Radio Science, 20.-21.11.1989, Abstracts L 2/3.

    Frey, H., Jäntti, V., Häkkinen, T., Erilä, P., Loula, S., Kalli, N., Saranummi, A., Värri, A. & Neuvo, Y. 1988.
    Long-Term EEG During Epileptic Discharges and Automatic Real Time Analysis .
    Proc.of the 27th Scandinavian Congress of Neurology, Kuopio, Finland, June 15-18, 1988, Acta Neurologica Scandinavia, Supplementum vol. 77, num. 116,

    Häkkinen, V., Värri, A., Neuvo, Y., Frey, H. & Heikkilä, H. 1988.
    Quantitative EEG During Wakefulness and Sleep Using Adaptive Segmentation .
    9th European Congress of Sleep Research, Jerusalem, Israel, September 4-9, 1988

    Loula, P., Värri, A., Heikkilä, H. & Frey, H. 1988.
    System for automatic real-time analysis of the long-term EEG in epilepsy .
    Proceedings of the 1st European Congress of Neurology. Modern Trends in Neurology and Neurologic al Emergencies, Prague, Czechoslovakia, April 1988

    Värri, A., Neuvo, Y., Loula, P. & Heikkilä, H. 1988.
    Computerized Classification of Long Term Recordings of Epileptic EEG .
    STeP-88, Finnish Artificial Intelligence Symposium, University of Helsinki, August 15-18 vol. 1, s. 53-62.

    Värri, A., Neuvo, Y., Loula, P. & Hiekkilä, H. 1987.
    Computerized Classification of Long Term Recordings of Epileptic EEG .
    URSI/IEEE XIII Radiotieteen päivä, Oulu, 3 November Oulu, s. 16.