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@article{DAN_1970_195_1_a11, author = {L. A. Shemetkov}, title = {The existence of $\Pi$-complements to normal subgroups of finite groups}, journal = {Doklady Akademii Nauk}, pages = {50--52}, publisher = {mathdoc}, volume = {195}, number = {1}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1970_195_1_a11/} }
L. A. Shemetkov. The existence of $\Pi$-complements to normal subgroups of finite groups. Doklady Akademii Nauk, Tome 195 (1970) no. 1, pp. 50-52. http://geodesic.mathdoc.fr/item/DAN_1970_195_1_a11/