%0 Journal Article
%A K. S. Sibirskii
%T On the number of limit cycles in the neighborhood of a singular point
%J Differencialʹnye uravneniâ
%D 1965
%P 53-66
%V 1
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1965_1_1_a6/
%G ru
%F DE_1965_1_1_a6