%0 Journal Article
%A L. A. Chelysheva
%T On the theory of generalized characteristic numbers
%J Differencialʹnye uravneniâ
%D 1968
%P 1616-1624
%V 4
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_9_a6/
%G ru
%F DE_1968_4_9_a6