Yli-Hankala A., Heikkilä H., Värri A., Jäntti V., Correlation between the EEG and heart rate variation in deep entflurane anaesthesia. Acta Anaesthesia Scandinavica, Vol. 34, pp. 138-143, 1990.
Krajca V., Petranek S., Patakova I., Värri A.: Automatic Identification of Significant Graphoelements in Multichannel EEG Recordings by Adaptive Segmentation and Fuzzy Clustering. Int. J. Bio-Medical Computing, Vol. 28, pp. 71-89, 1991.
Kemp B., Värri A., Rosa A.C., Nielsen K.D., Gade J.: A simple format for exchange of digitized polygraphic recordings. Electroencephalogr. Clin. Neurophysiol., Vol. 82, pp. 391-393, 1992.
Värri A., Hirvonen K., Hasan J., Loula P., Häkkinen V.: A computerized analysis system for vigilance studies. Computer Methods and Programs in Biomedicine, Vol. 39, pp. 113-124, 1992.
Häkkinen V., Hirvonen K., Hasan J., Kataja M., Värri A., Loula P., Eskola H.: The effect of small differences in electrode positions on EOG signals: application to vigilance studies, Electroencephalogr. Clin. Neurophysiol., Vol. 86, pp. 294-300, 1993.
Hasan J., Hirvonen K., Värri A., Häkkinen V., Loula P.: Validation of computer analysed polygraphic patterns during drowsiness and sleep onset. Electroencephalogr. Clin. Neurophysiol., Vol. 87, pp. 117-127, 1993.
Pulli K., Härmä M., Hasan J., Värri A., Loula P.: The relationship between EEG delta activity and autonomic activity as measured by SCSB during daytime sleep. Journal of Sleep Research, Vol. 3, pp. 106-110, 1994.
Pietilä T., Vapaakoski S., Nousiainen U., Värri A., Frey H., Häkkinen V., Neuvo Y.: Evaluation of a computerized system for recognition of epileptic activity during long-term EEG monitoring, Electroencephalogr. Clin. Neurophysiol., Vol. 90, pp. 438-443, 1994.
Vuorimaa P.: Fuzzy Self-Organizing Map. Fuzzy Sets and Systems, Vol. 66, pp. 223-231, 1993.
Erdi P., Grobler T., Barna G., Kaski K.: Dynamics of the Olfactory Bulb Bifurcation, Learning and Memory, Biol. Cybernetics, Vol. 69, 1993, pp. 57-66.
Värri A., Häkkinen V., Hasan J., Loula P.: A New Nonlinear EOG Processing method for Vigilance Studies, Proc. 1st European Conference on Biomedical Engineering, Nice, France, pp. 334-335, 17.-20.2.1991.
Elo P., Saarinen J., Värri A., Nieminen H., Kaski K.: Classification of epileptic EEG by using self-organized maps, Proc. of International Conference on Artificial Neural Networks (ICANN-92), Brighton, United Kingdom, September 1992, in Artificial neural networks, 2nd edition, Aleksander I., Taylor J. (eds), Elsevier Science Publishers, pp. 1147-1150, 1992.
Lehtokangas M., Saarinen J., Huuhtanen P., Kaski K.: Neural Network Prediction of Non-linear Time Series Using Predictive MDL Principle, Proc. of IEEE Winter Workshop on Nonlinear Digital Signal Processing, Jan. 17-20 1993, Tampere, Finland, pp. 7.2-2.1 - 7.2-2.6.
Vuorimaa P.: Use of a default rule in Fuzzy Self-Organizing Map. Proc. 2nd. Int. Conf. on Fuzzy Theory and Technology, Durham, North Carolina, USA, pp. 78-80, 1993.
Lehtokangas M., Saarinen J., Huuhtanen P., Kaski K.: Neural Network Modeling and Prediction of Multivariate Time Series Using Predictive MDL Principle, Proc. of International Conference on Artificial Neural Networks, ICANN-93, Sep. 13-16 1993, Amsterdam, The Netherlands, pp. 826-829.
Lehtokangas M., Saarinen J., Huuhtanen P., Kaski K.: Chaotic Time Series Modeling with Optimum Neural Network Architecture, Proc. of International Joint Conference on Neural Networks, IJCNN-93, Oct. 25-29 1993, Nagoya, Japan, pp. 2276-2279.
Lehtokangas M., Saarinen J., Huuhtanen P., Kaski K.: Neural Network Optimization Tool Based on Predictive MDL Principle for Time Series Prediction, Proc. of the International Conference on Tools with Artificial Intelligence, TAI-93, Nov. 8-11 1993, Boston, Massachusetts, U.S.A., pp. 338-342.
Pietilä T., Värri A., Vapaakoski S., Nousiainen U., Häkkinen V., Frey H.: A new computerized analysis system for long-term EEG recordings in epilepsy and its evaluations. Abstract book of Neuroscience 1992, Turku, Finland, p. 60, 8.-9.10.1992.
Värri A., Elo P., Saarinen J., Loula P., Pietilä T., Vapaakoski S., Kaski K.: Pattern recognition of the EEG in epilepsy with neural networks, Second International Hans-Berger-Congress "Quantitative and Topological EEG and MEG Analysis" Jena, Germany, supplement to abstract book, 8.-11.9.1993.
Laaksonen J., Pietilä T., Värri A., Loula P., Vapaakoski S., Frey H.: A Seizure and spike detector and EEG browser for a PC with a signal processor card, Proceedings of the Fifth International Cleveland Clinic - Bethel Epilepsy Symposium, Cleveland, Ohio, USA, p. 56, 22.-25.5.1994.
Lipping T.: Processing of burst-suppression EEG, Master's thesis, Tampere University of Technology, Finland, 1993.
Tervonen M.: Human vigilance analysis using neural networks and fuzzy systems, Master's thesis, Tampere University of Technology, Finland, 1994.
Loula P.: Nonlinear methods of processing physiological signals in anaesthesia and vigilance, Doctoral Thesis, Tampere University of Technology, 1994.