%0 Journal Article
%A L. I. Zhilevich
%T On the existence of a limit cycle in an autonomous system
%J Differencialʹnye uravneniâ
%D 1994
%P 377-380
%V 30
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1994_30_3_a1/
%G ru
%F DE_1994_30_3_a1