@article{MZM_1997_61_5_a12,
     author = {V. N. Tyutyanov},
     title = {On the existence of solvable normal subgroups in finite groups},
     journal = {Matemati\v{c}eskie zametki},
     pages = {755--758},
     publisher = {mathdoc},
     volume = {61},
     number = {5},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1997_61_5_a12/}
}