Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1969_5_1_a15, author = {Ya. G. Berkovich}, title = {Finite groups all $n$-th maximal subgroups of which are generalized schmidt groups}, journal = {Matemati\v{c}eskie zametki}, pages = {129--136}, publisher = {mathdoc}, volume = {5}, number = {1}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_1_a15/} }
Ya. G. Berkovich. Finite groups all $n$-th maximal subgroups of which are generalized schmidt groups. Matematičeskie zametki, Tome 5 (1969) no. 1, pp. 129-136. http://geodesic.mathdoc.fr/item/MZM_1969_5_1_a15/