Hu, B., J. Huang, and N. M. Adarchenko. “On $\Pi$-Permutable Subgroups in Finite Groups”. Ukrains’kyi Matematychnyi Zhurnal 73, no. 10 (October 17, 2021): 1423-1431. Accessed April 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/768.