@article{PFMT_2015_3_a9,
     author = {R. V. Borodich and S. N. Bykov},
     title = {On operator generalization of {Frattini} subgroup},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {55--58},
     publisher = {mathdoc},
     number = {3},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2015_3_a9/}
}