TY  - JOUR
AU  - V. A. Roman'kov
TI  - Nondistributivity of the lattice of varieties of nilpotent groups
JO  - Algebra i logika
PY  - 1970
SP  - 67
EP  - 72
VL  - 9
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AL_1970_9_1_a4/
LA  - ru
ID  - AL_1970_9_1_a4
ER  -