%0 Journal Article
%A V. M. Lebedeva
%T The number of periodic solutions of a first order differential equation with polynomial right hand side
%J Differencialʹnye uravneniâ
%D 1968
%P 1428-1432
%V 4
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_8_a7/
%G ru
%F DE_1968_4_8_a7