TY  - JOUR
AU  - Kh. Kh. Murtazin
TI  - On nonisolated singular points of the spectrum of elliptic operators
JO  - Izvestiya. Mathematics 
PY  - 1976
SP  - 393
EP  - 411
VL  - 10
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1976_10_2_a9/
LA  - en
ID  - IM2_1976_10_2_a9
ER  -