%0 Journal Article
%A O. G. Illarionova
%T On an upper central exponent for linear systems with unbounded coefficients
%J Differencialʹnye uravneniâ
%D 1995
%P 206-212
%V 31
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1995_31_2_a2/
%G ru
%F DE_1995_31_2_a2