Zubei, E. V., V. N. Knyagina, and V. S. Monakhov. “On the Solvability of a Finite Group with $S$-Seminormal Schmidt Subgroups”. Ukrains’kyi Matematychnyi Zhurnal 70, no. 11 (November 25, 2018): 1511-1518. Accessed May 2, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1654.