Y. V. Lutsenko and A. N. Skiba, “Structure of finite groups with S-quasinormal third maximal subgroups”, Ukr. Mat. Zhurn., vol. 61, no. 12, pp. 1630–1639, Dec. 2009, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3127