TY  - JOUR
AU  - LI, CHI-KWONG
AU  - POON, YIU-TUNG
TI  - SPECTRUM, NUMERICAL RANGE AND DAVIS-WIELANDT SHELL OF A NORMAL OPERATOR
JO  - Glasgow mathematical journal
PY  - 2009
SP  - 91
EP  - 100
VL  - 51
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0017089508004564/
DO  - 10.1017/S0017089508004564
ID  - 10_1017_S0017089508004564
ER  -