Katsura, Masashi, and András Ádám. “On a Problem of Ádám Concerning Precodes Assigned to Finite Moore Automata”. Acta Cybernetica 8, no. 2 (January 1, 1987): 143-151. Accessed May 8, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3327.