Hu B, Huang J, Adarchenko NM. On $\Pi$-permutable subgroups in finite groups. Ukr. Mat. Zhurn. [Internet]. 2021 Oct. 17 [cited 2025 Dec. 5];73(10):1423-31. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/768