TY  - JOUR
AU  - O. A. Kovaleva
TI  - On a~property of the index of non-local elliptic problems
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1999
SP  - 843
EP  - 844
VL  - 54
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1999_54_4_a13/
LA  - en
ID  - RM_1999_54_4_a13
ER  -