%0 Journal Article
%A D. S. Ushkho
%T On the coexistence of limit cycles and singular points of ``center'' type of cubic differential systems
%J Differencialʹnye uravneniâ
%D 1995
%P 173-174
%V 31
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1995_31_1_a28/
%G ru
%F DE_1995_31_1_a28