SKOBELEV, V. G. Representation of Automata by Groups. II. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 10, p. 1397–1404, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4544. Acesso em: 5 dec. 2025.