Babcsányi, István, and Attila Nagy. “Mealy-Automata in Which the Output-Equivalence Is .A Congruence”. Acta Cybernetica 11, no. 3 (January 1, 1994): 121-126. Accessed November 22, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3424.