TY - JOUR AU - Yu. A. Belov TI - On the question of the lattice of nilpotent varieties of groups of JO - Algebra i logika PY - 1970 SP - 623 EP - 628 VL - 9 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AL_1970_9_6_a0/ LA - ru ID - AL_1970_9_6_a0 ER -