@article{2027,
author = {Elsner, L.},
title = {Perturbation theorems for the matrix eigenvalue problem},
journal = {Portugaliae mathematica},
volume = {43},
year = {1985},
pages = {69-76},
zbl = {0579.15007},
mrnumber = {0875054},
language = {en},
url = {http://dml.mathdoc.fr/item/2027}
}
Elsner, L. Perturbation theorems for the matrix eigenvalue problem. Portugaliae mathematica, Tome 43 (1985) pp. 69-76. http://gdmltest.u-ga.fr/item/2027/