%0 Journal Article
%A V. V. Amel'kin
%T The periodic solutions of a certain system with a small parameter
%J Differencialʹnye uravneniâ
%D 1968
%P 1720-1723
%V 4
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_9_a18/
%G ru
%F DE_1968_4_9_a18