X. He, S. Li, and Y. Wang, “Groups all cyclic subgroups of which are BN A-subgroups”, Ukr. Mat. Zhurn., vol. 69, no. 2, pp. 284–288, Feb. 2017, Accessed: Feb. 04, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/1695