@article{PFMT_2011_2_a12,
     author = {V. N. Semenchuk and V. F. Veliasnitski},
     title = {On the finite groups factorizable by formation subgroups},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {69--74},
     year = {2011},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2011_2_a12/}
}