@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/}
}