@article{GDZPPN001183567, title = {A Relative Backward Perturbation Theorem for the Eigenvalue Problem.}, journal = {Numerische Mathematik}, volume = {56}, year = {1989}, pages = {625-626}, zbl = {0686.65014}, url = {http://dml.mathdoc.fr/item/GDZPPN001183567} }
Deif, A. A Relative Backward Perturbation Theorem for the Eigenvalue Problem.. Numerische Mathematik, Tome 56 (1989) pp. 625-626. http://gdmltest.u-ga.fr/item/GDZPPN001183567/