%0 Journal Article
%A V. V. Martynov
%T Direct methods for the qualitative spectral analysis of a nonselfadjoint system of first order differential equations. I
%J Differencialʹnye uravneniâ
%D 1968
%P 1494-1508
%V 4
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_8_a13/
%G ru
%F DE_1968_4_8_a13