@article{00907056,
title = {Numerical ranges of an operator on an indefinite inner product space.},
journal = {ELA. The Electronic Journal of Linear Algebra [electronic only]},
volume = {1},
year = {1996},
zbl = {0851.15018},
language = {en},
url = {http://dml.mathdoc.fr/item/00907056}
}
Li, Chi-Kwong; Tsing, Nam-Kui; Uhlig, Frank. Numerical ranges of an operator on an indefinite inner product space.. ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 1 (1996) . http://gdmltest.u-ga.fr/item/00907056/