TY  - JOUR
AU  - M. Sh. Birman
AU  - M. Z. Solomyak
TI  - Estimates for the difference of the fractional powers of self-adjoint operators under unbounded perturbations
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1989
SP  - 120
EP  - 145
VL  - 178
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1989_178_a4/
LA  - ru
ID  - ZNSL_1989_178_a4
ER  -