%0 Journal Article
%A I. U. Bronshtein
%T Necessary conditions for the preservation of smooth invariant submanifolds
%J Differencialʹnye uravneniâ
%D 1986
%P 573-581
%V 22
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1986_22_4_a1/
%G ru
%F DE_1986_22_4_a1