%0 Journal Article %A S. A. Gurchenkov %T Varieties of $l$-groups with identity $[x^p,y^p]=e$ are %J Algebra i logika %D 1984 %P 27-47 %V 23 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1984_23_1_a1/ %G ru %F AL_1984_23_1_a1