@article{IM2_1971_5_4_a5,
     author = {Ya. G. Berkovich},
     title = {A~generalization of the theorems of {Hall} and {Blackburn} and their applications to nonregular $p$-groups},
     journal = {Izvestiya. Mathematics },
     pages = {815--844},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_4_a5/}
}