@article{GDZPPN001167294,
title = {On Smallest Isolated Gerschgorin Disks for Eigenvalues. III.},
journal = {Numerische Mathematik},
volume = {11},
year = {1968},
pages = {361-369},
zbl = {0164.17701},
url = {http://dml.mathdoc.fr/item/GDZPPN001167294}
}
VARGA, R.S.; MEDLEY, H.I. On Smallest Isolated Gerschgorin Disks for Eigenvalues. III.. Numerische Mathematik, Tome 11 (1968) pp. 361-369. http://gdmltest.u-ga.fr/item/GDZPPN001167294/