TY  - JOUR
AU  - N. S. Romanovskii
TI  - A~freedom theorem for groups with one defining relation in the varieties of solvable and nilpotent groups of given lengths
JO  - Sbornik. Mathematics
PY  - 1972
SP  - 93
EP  - 99
VL  - 18
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1972_18_1_a5/
LA  - en
ID  - SM_1972_18_1_a5
ER  -