TY  - JOUR
AU  - Bebiano, Natália
TI  - Some variations on the concept of the c-numerical range
JO  - Portugaliae mathematica
PY  - 1985
SP  - 189
EP  - 200
VL  - 43
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1985__43_1_114502/
LA  - en
ID  - PORMA_1985__43_1_114502
ER  -