TY  - JOUR
AU  - Yu. M. Gorčakov
TI  - On the central series of the free groups of varieties
JO  - Algebra i logika
PY  - 1967
SP  - 13
EP  - 24
VL  - 6
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1967_6_3_a2/
LA  - ru
ID  - AL_1967_6_3_a2
ER  -