TY  - JOUR
AU  - N. Anghel
TI  - On the Index of Callias-type Operators.
JO  - Geometric and functional analysis
PY  - 1993
SP  - 431
EP  - 438
VL  - 3
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/GFA_1993__3_6_58139/
ID  - GFA_1993__3_6_58139
ER  -