%0 Journal Article
%A E. P. Sobolevskii
%T An averaging principle and stability of differential equations with a small parameter
%J Differencialʹnye uravneniâ
%D 1979
%P 1444-1449
%V 15
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1979_15_8_a9/
%G ru
%F DE_1979_15_8_a9