N. F. Kuzenny and I. Y. . Subbotin, “New characterizations of locally nilpotent $\bar{IH}$-groups”, Ukr. Mat. Zhurn., vol. 40, no. 3, pp. 322–326, Apr. 1988, Accessed: Dec. 07, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/9142