%0 Journal Article
%A A. G. Kolpakov
%T Averaging in a second-order differential equation
%J Differencialʹnye uravneniâ
%D 1982
%P 1680-1684
%V 18
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1982_18_10_a3/
%G ru
%F DE_1982_18_10_a3