%0 Journal Article
%A E. A. Grebenikov
%T Certain estimates of the method of averaging for multifrequency systems of ordinary differential equations
%J Differencialʹnye uravneniâ
%D 1968
%P 459-473
%V 4
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_3_a7/
%G ru
%F DE_1968_4_3_a7