%0 Journal Article
%A Yu. S. Bogdanov
%T Generalized characteristic numbers of non-autonomous systems
%J Differencialʹnye uravneniâ
%D 1965
%P 1140-1148
%V 1
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1965_1_9_a1/
%G ru
%F DE_1965_1_9_a1