%0 Journal Article
%A V. I. Rozhkov
%A M. A. Hekimova
%T A method for studying the periodic solutions of systems of difference and differential-difference equations with small lag
%J Differencialʹnye uravneniâ
%D 1976
%P 1770-1780
%V 12
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_10_a4/
%G ru
%F DE_1976_12_10_a4