%0 Journal Article
%A Yu. A. Ryabov
%T Estimations of the convergence region of periodical series representing solutions of differential equations involving a small parameter
%J Doklady Akademii Nauk
%D 1958
%P 642-645
%V 118
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_118_4_a4/
%G ru
%F DAN_1958_118_4_a4