@article{02144312,
title = {Hyponormal matrices and semidefinite invariant subspaces in indefinite inner products.},
journal = {ELA. The Electronic Journal of Linear Algebra [electronic only]},
volume = {11},
year = {2004},
pages = {192-204},
zbl = {1066.15030},
language = {en},
url = {http://dml.mathdoc.fr/item/02144312}
}
Mehl, Christian; Ran, André C.M.; Rodman, Leiba. Hyponormal matrices and semidefinite invariant subspaces in indefinite inner products.. ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 11 (2004) pp. 192-204. http://gdmltest.u-ga.fr/item/02144312/