time series of epileptic seizures. Physica D46:427-438 Friedrich, R., Fuchs, A., Haken, H. (1991): Spatio-temporal EEG patterns In (ed. H.Haken and H.P. Kopchen) Synergetics of Rhythms. Springer. Berlin Gallez, D.,Babloyantz, A. (1991) Predictability of human EEG: a dynamical approach. Biol Cybern 64:381-391