TY  - JOUR
AU  - G. A. Isaev
TI  - On the theory of defect indices for multiparameter differential operators of Sturm--Liouville type
JO  - Doklady Akademii Nauk
PY  - 1981
SP  - 788
EP  - 791
VL  - 261
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1981_261_4_a3/
LA  - ru
ID  - DAN_1981_261_4_a3
ER  -