%0 Journal Article
%A A. N. Erugin
%T Analytic structure of the solution of a differential equation with nonholomorphic right side in the case of a center or focus
%J Differencialʹnye uravneniâ
%D 1966
%P 934-942
%V 2
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1966_2_7_a7/
%G ru
%F DE_1966_2_7_a7