%0 Journal Article
%A E. F. Mishchenko
%A L. S. Pontryagin
%T A proof of some asymptotic formulas for solutions of differential equations involving a small parameter
%J Doklady Akademii Nauk
%D 1958
%P 967-969
%V 120
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_120_5_a9/
%G ru
%F DAN_1958_120_5_a9