@article{GDZPPN001169750, title = {Perturbation d'une matrice hermitienne ou normale.}, journal = {Numerische Mathematik}, volume = {18}, year = {1971}, pages = {318-337}, zbl = {0221.65072}, url = {http://dml.mathdoc.fr/item/GDZPPN001169750} }
CHATELIN-LABORDE, F. Perturbation d'une matrice hermitienne ou normale.. Numerische Mathematik, Tome 18 (1971) pp. 318-337. http://gdmltest.u-ga.fr/item/GDZPPN001169750/