TY  - JOUR
AU  - Li, Chi-Kwong
AU  - Sourour, Ahmed Ramzi
TI  - Linear Operators on Matrix Algebras that Preserve the Numerical Range, Numerical Radius or the States
JO  - Canadian journal of mathematics
PY  - 2004
SP  - 134
EP  - 167
VL  - 56
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-2004-007-4/
DO  - 10.4153/CJM-2004-007-4
ID  - 10_4153_CJM_2004_007_4
ER  -