%0 Journal Article
%A G. L. Yuzbashev
%T A study of the set of periodic solutions of a certain system of second order differential equations without dissipation
%J Differencialʹnye uravneniâ
%D 1973
%P 1734-1737
%V 9
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1973_9_9_a22/
%G ru
%F DE_1973_9_9_a22