TY  - JOUR
AU  - N. G. Makarov
TI  - Perturbations of normal operators and stability of the continuous spectrum
JO  - Izvestiya. Mathematics 
PY  - 1987
SP  - 535
EP  - 558
VL  - 29
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1987_29_3_a2/
LA  - en
ID  - IM2_1987_29_3_a2
ER  -