%0 Journal Article
%A A. V. Lasunsky
%T On a small variation of the characteristic indices of a regular linear system
%J Differencialʹnye uravneniâ
%D 1985
%P 901-903
%V 21
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1985_21_5_a25/
%G ru
%F DE_1985_21_5_a25