TY  - JOUR
AU  - L. B. Zelenko
TI  - Deficiency index and spectrum of a selfadjoint system of first-order differential equations
JO  - Doklady Akademii Nauk
PY  - 1968
SP  - 278
EP  - 281
VL  - 181
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1968_181_2_a4/
LA  - ru
ID  - DAN_1968_181_2_a4
ER  -