BUŁATEK, Wojciech, COURBAGE, Maurice, KAMIŃSKI, Brunon and SZYMAŃSKI, Jerzy. An application of the ergodic theorem of information theory to Lyapunov exponents of cellular automata. Topological Methods in Nonlinear Analysis. Online. 1 December 2012. Vol. 40, no. 2, pp. 415 - 427. [Accessed 5 July 2025]. DOI 10.12775/TMNA.2012.039.