%0 Journal Article
%A G. E. Popov
%T A certain class of integrable equations with limit cycles
%J Differencialʹnye uravneniâ
%D 1972
%P 1898-1900
%V 8
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1972_8_10_a25/
%G ru
%F DE_1972_8_10_a25