@article{MZM_1999_66_6_a5,
     author = {V. S. Monakhov and M. V. Sel'kin},
     title = {Normal subgroups of finite groups, and formations with normalizer conditions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {867--870},
     publisher = {mathdoc},
     volume = {66},
     number = {6},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1999_66_6_a5/}
}