%0 Journal Article
%A B. S. Kalitin
%T On the method of sign-constant Lyapunov functions for nonautonomous differential systems
%J Differencialʹnye uravneniâ
%D 1995
%P 583-590
%V 31
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1995_31_4_a3/
%G ru
%F DE_1995_31_4_a3