1. Monakhov V. S., Introduction to the Theory of Finite Groups and Their Classes, Vysheishaya Shkola, Minsk (2006) [Russian].
2. Baer R., “Supersoluble immersion,” Canad. J. Math., vol. 11, 353–369 (1959).
3. Monakhov V. S. and Chirik I. K., “On the supersoluble residual of a product of subnormal supersoluble subgroups,” Sib. Math. J., vol. 58, no. 2, 271–280 (2017).
4. Su X., “On semi-normal subgroups of finite group,” J. Math. (Wuhan), vol. 8, no. 1, 7–9 (1988).
5. Monakhov V. S. and Trofimuk A. A., “On supersolubility of a group with seminormal subgroups,” Sib. Math. J., vol. 61, no. 1, 118–126 (2020).