@article{05947042,
title = {An extension of the perturbation analysis for the Drazin inverse.},
journal = {ELA. The Electronic Journal of Linear Algebra [electronic only]},
volume = {22},
year = {2011},
pages = {539-556},
zbl = {1223.15004},
language = {en},
url = {http://dml.mathdoc.fr/item/05947042}
}
Castro-Gonzalez, N.; Martinez-Serrano, M.F.; Robles, J. An extension of the perturbation analysis for the Drazin inverse.. ELA. The Electronic Journal of Linear Algebra [electronic only], Tome 22 (2011) pp. 539-556. http://gdmltest.u-ga.fr/item/05947042/