mical systems. Rev. Mod. Phys. 53:643-654 Eckmann, J., Ruelle, D. (1985) Ergodic theory of chaos and strange attractors. Rev. Mod. Phys. 57:617-656 Eckmann, J.P., Ruelle, D. (1992) Fundamental limitations for estimating dimensions and Lyapounov exponents in dynamical systems. Physica 56D:185-187 Eckman