TY  - JOUR
AU  - V. V. Martynov
TI  - Direct methods for the qualitative spectral analysis of a nonselfadjoint system of first order differential equations. II
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 2243
EP  - 2257
VL  - 4
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_12_a8/
LA  - ru
ID  - DE_1968_4_12_a8
ER  -