TY  - JOUR
AU  - Ya. G. Berkovich
TI  - A~generalization of the theorems of Hall and Blackburn and their applications to nonregular $p$-groups
JO  - Izvestiya. Mathematics 
PY  - 1971
SP  - 815
EP  - 844
VL  - 5
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1971_5_4_a5/
LA  - en
ID  - IM2_1971_5_4_a5
ER  -