%0 Journal Article
%A G. M. Buldyk
%T A remark on the number of Ljapunov constants for conditions for a center of a certain differential equation
%J Differencialʹnye uravneniâ
%D 1976
%P 1301-1302
%V 12
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_7_a17/
%G ru
%F DE_1976_12_7_a17