TY  - JOUR
AU  - P. L. Gurevich
TI  - On the Stability of the Index of Unbounded Nonlocal Operators in Sobolev Spaces
JO  - Informatics and Automation
PY  - 2006
SP  - 116
EP  - 135
VL  - 255
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_2006_255_a8/
LA  - ru
ID  - TRSPY_2006_255_a8
ER  -