%0 Journal Article
%A M. V. Dolov
%T A certain method of investigation of limit cycles
%J Differencialʹnye uravneniâ
%D 1968
%P 812-820
%V 4
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_5_a4/
%G ru
%F DE_1968_4_5_a4