@article{01151632,
title = {Shapes and computer generation of numerical ranges of Krein space operators.},
journal = {ELA. The Electronic Journal of Linear Algebra [electronic only]},
volume = {4},
year = {1998},
pages = {31-47},
zbl = {0905.47027},
language = {en},
url = {http://dml.mathdoc.fr/item/01151632}
}
Li, Chi-Kwong; Rodman, Leiba. Shapes and computer generation of numerical ranges of Krein space operators.. ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 4 (1998) pp. 31-47. http://gdmltest.u-ga.fr/item/01151632/