%0 Journal Article
%A A. P. Sadovskii
%T Center conditions and limit cycles in a cubic system of differential equations
%J Differencialʹnye uravneniâ
%D 2000
%P 98-102
%V 36
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2000_36_1_a13/
%G ru
%F DE_2000_36_1_a13