%0 Journal Article
%A V. V. Strygin
%T A theorem concerning the existence of periodic solutions of systems of differential equations with delayed arguments
%J Matematičeskie zametki
%D 1970
%P 229-234
%V 8
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1970_8_2_a10/
%G ru
%F MZM_1970_8_2_a10