TY  - JOUR
AU  - Li, Chi-Kwong
AU  - Zaharia, Alexandru
TI  - Nonconvexity of the Generalized Numerical Range Associated with the Principal Character
JO  - Canadian mathematical bulletin
PY  - 2000
SP  - 448
EP  - 458
VL  - 43
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2000-053-3/
DO  - 10.4153/CMB-2000-053-3
ID  - 10_4153_CMB_2000_053_3
ER  -