%0 Journal Article
%A I. A. Kruglov
%A I. V. Cherednik
%T On the existence of non-negative bases in subgroups of free groups of Schreier varieties
%J Matematičeskie voprosy kriptografii
%D 2019
%P 53-65
%V 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MVK_2019_10_a3/
%G ru
%F MVK_2019_10_a3