%0 Journal Article
%A A. A. Grin'
%T A cubic Dulac function for a polynomial autonomous system on the plane with right-hand sides that are fourth-order nonlinearities
%J Differencialʹnye uravneniâ
%D 2000
%P 558-560
%V 36
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2000_36_4_a18/
%G ru
%F DE_2000_36_4_a18