KAMORNIKOV, S. F.; TYUTYANOV, V. N. On $\sigma$-subnormal subgroups of finite 3’-groups. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 6, p. 806–811, 2020. DOI: 10.37863/umzh.v72i6.1037. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1037. Acesso em: 27 apr. 2025.