@article{2040,
author = {Bebiano, Nat\'alia},
title = {Some variations on the concept of the c-numerical range},
journal = {Portugaliae mathematica},
volume = {43},
year = {1985},
pages = {189-200},
zbl = {0613.15022},
mrnumber = {0875067},
language = {en},
url = {http://dml.mathdoc.fr/item/2040}
}
Bebiano, Natália. Some variations on the concept of the c-numerical range. Portugaliae mathematica, Tome 43 (1985) pp. 189-200. http://gdmltest.u-ga.fr/item/2040/