%0 Journal Article
%A È. I. Grudo
%T On the theory of stability of ordinary differential systems and Pfaffian systems
%J Differencialʹnye uravneniâ
%D 1983
%P 782-789
%V 19
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1983_19_5_a2/
%G ru
%F DE_1983_19_5_a2