%0 Journal Article
%A G. A. Gurevich
%T On the ranks of coefficient-free equations in a free group
%J Doklady Akademii Nauk
%D 1973
%P 272-274
%V 209
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1973_209_2_a2/
%G ru
%F DAN_1973_209_2_a2