%0 Journal Article
%A Yu. M. Gorchakov
%A V. M. Levchuk
%T The approximation of free groups
%J Algebra i logika
%D 1970
%P 415-421
%V 9
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AL_1970_9_4_a2/
%G ru
%F AL_1970_9_4_a2