%0 Journal Article
%A L. A. Cherkas
%T A Precise Estimate of the Number of Limit Cycles of Autonomous Systems on the Plane
%J Differencialʹnye uravneniâ
%D 2003
%P 759-768
%V 39
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2003_39_6_a4/
%G ru
%F DE_2003_39_6_a4