%0 Journal Article
%A A. V. Pechenev
%T Averaging of systems with hierarchy of phase rotation speeds on
%J Doklady Akademii Nauk
%D 1990
%P 28-31
%V 315
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1990_315_1_a4/
%G ru
%F DAN_1990_315_1_a4