[1]
Kamornikov, S.F. and Tyutyanov, V.N. 2020. On $\sigma$-subnormal subgroups of finite 3’-groups. Ukrains’kyi Matematychnyi Zhurnal. 72, 6 (Jun. 2020), 806-811. DOI:https://doi.org/10.37863/umzh.v72i6.1037.