TY  - JOUR
AU  - Shmuel Kantorovitz
TI  - Spectrality Criteria for Unbounded Operators with Real Spectrum.
JO  - Mathematische Annalen
PY  - 1981
SP  - 19
EP  - 28
VL  - 256
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1981__256_163493/
ID  - MAN_1981__256_163493
ER  -