T. D. Lukashova, “On Noncyclic Norm of Infinite Locally Finite Groups”, Ukr. Mat. Zhurn., vol. 54, no. 3, pp. 342–349, Mar. 2002, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4070