%0 Journal Article
%A V. V. Uspenskii
%T Subgroups of free topological groups
%J Doklady Akademii Nauk
%D 1985
%P 1070-1072
%V 285
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1985_285_5_a11/
%G ru
%F DAN_1985_285_5_a11