@article{PFMT_2015_3_a13,
     author = {A. N. Skiba},
     title = {On $\sigma$-properties of finite {groups~II}},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {70--83},
     publisher = {mathdoc},
     number = {3},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2015_3_a13/}
}