TY  - JOUR
AU  - Peter Vieten
TI  - Four characterizations of scalar-type operators with spectrum in a half-line
JO  - Studia Mathematica
PY  - 1997
SP  - 39
EP  - 54
VL  - 122
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-122-1-39-54/
DO  - 10.4064/sm-122-1-39-54
LA  - en
ID  - 10_4064_sm_122_1_39_54
ER  -