C. Li and Y. Li, “On ss-quasinormal and weakly s-supplemented subgroups of finite groups”, Ukr. Mat. Zhurn., vol. 63, no. 12, pp. 1623–1631, Dec. 2011, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2830