6) The nature of dominant Lyapunov exponent and attractor dimension curves of EEG in sleep. Comput Biol Med 26:419-428 Press, W.H., Flannery, B.P., Teukolsky, S.A., Vetterling, W.T. (1991) Numerical Recipies; The Art of Scientific Computing. Cambridge University Press, Cambridge. Pritchard, W.S. (1992) Th