@article{PFMT_2019_3_a11,
     author = {S. F. Kamornikov and O. L. Shemetkova},
     title = {On permutability of $\sigma$-subnormal subgroups of finite group},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {70--73},
     publisher = {mathdoc},
     number = {3},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2019_3_a11/}
}