@article{1273587701,
author = {NAKAZATO, Hiroshi},
title = {The $C$ -Numerical Range of a $3\times 3$ Normal Matrix},
journal = {Nihonkai Math. J.},
volume = {17},
number = {1},
year = {2006},
pages = { 187-197},
language = {en},
url = {http://dml.mathdoc.fr/item/1273587701}
}
NAKAZATO, Hiroshi. The $C$ -Numerical Range of a $3\times 3$ Normal Matrix. Nihonkai Math. J., Tome 17 (2006) no. 1, pp. 187-197. http://gdmltest.u-ga.fr/item/1273587701/