Li, Y. and Qiao, S. (2011) “On weakly s -normal subgroups of finite groups”, Ukrains’kyi Matematychnyi Zhurnal, 63(11), pp. 1555–1564. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2825 (Accessed: 5 December 2025).