@article{GDZPPN001170759,
title = {A posteriori Error Bounds for the Zeros of a Polynomial.},
journal = {Numerische Mathematik},
volume = {19},
year = {1972},
pages = {139-148},
zbl = {0235.65034},
url = {http://dml.mathdoc.fr/item/GDZPPN001170759}
}
Gutknecht, Martin. A posteriori Error Bounds for the Zeros of a Polynomial.. Numerische Mathematik, Tome 19 (1972) pp. 139-148. http://gdmltest.u-ga.fr/item/GDZPPN001170759/