%0 Journal Article
%A L. A. Cherkas
%T On the question of the analyticity of a manifold that defines limit cycles
%J Differencialʹnye uravneniâ
%D 1982
%P 839-845
%V 18
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_5_a14/
%G ru
%F DE_1982_18_5_a14