Katona, Endre. “Local and Global Reversibility of Finite Inhomogeneous Cellular Automaton”. Acta Cybernetica 3, no. 4 (January 1, 1977): 287-292. Accessed July 16, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3154.