TY  - JOUR
AU  - V. P. Serebryakov
TI  - On the deficiency index of second-order matrix differential operators
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1997
SP  - 1326
EP  - 1327
VL  - 52
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1997_52_6_a24/
LA  - en
ID  - RM_1997_52_6_a24
ER  -