%0 Journal Article
%A N. N. Vinogradov
%T The existence of a periodic solution of a nonlinear system of three differential equations
%J Differencialʹnye uravneniâ
%D 1970
%P 1901
%V 6
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1970_6_10_a20/
%G ru
%F DE_1970_6_10_a20