%0 Journal Article
%A I. G. Rozet
%T Coefficient criteria for the existence of separatrix cycles for a certain quadratic equation
%J Differencialʹnye uravneniâ
%D 1972
%P 1791-1796
%V 8
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1972_8_10_a8/
%G ru
%F DE_1972_8_10_a8