%0 Journal Article
%A N. A. Izobov
%A O. P. Stepanovich
%T Properties of the coefficient of nonregularity of linear systems
%J Differencialʹnye uravneniâ
%D 1990
%P 1899-1906
%V 26
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1990_26_11_a8/
%G ru
%F DE_1990_26_11_a8