V. G. Skobelev, “Representation of Automata by Groups. II”, Ukr. Mat. Zhurn., vol. 52, no. 10, pp. 1397–1404, Oct. 2000, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4544