%0 Journal Article %A V. D. Chertok %T Unattainable subgroups and the normal structure of finite groups %J Doklady Akademii Nauk %D 1967 %P 282-284 %V 173 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_173_2_a11/ %G ru %F DAN_1967_173_2_a11