@article{GDZPPN001164023,
title = {Bounds for iterates, inverses, spectral variation and fields of values of non-normal matrices.},
journal = {Numerische Mathematik},
volume = {4},
year = {1962},
pages = {24-40},
zbl = {0102.01502},
url = {http://dml.mathdoc.fr/item/GDZPPN001164023}
}
HENRICI, P. Bounds for iterates, inverses, spectral variation and fields of values of non-normal matrices.. Numerische Mathematik, Tome 4 (1962) pp. 24-40. http://gdmltest.u-ga.fr/item/GDZPPN001164023/