%0 Journal Article
%A L. A. Cherkas
%T Conditions for a center for the equation $yy'=\sum_{i=0}^3 p_i(x)y^i$
%J Differencialʹnye uravneniâ
%D 1978
%P 1594-1600
%V 14
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1978_14_9_a6/
%G ru
%F DE_1978_14_9_a6