%0 Journal Article
%A Yu. M. Gorčakov
%T On the central series of the free groups of varieties
%J Algebra i logika
%D 1967
%P 13-24
%V 6
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1967_6_3_a2/
%G ru
%F AL_1967_6_3_a2