Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1969__13_131906, author = {J.E. OSBORN}, title = {A {Note} on a {Perturbation} {Theorem} for the {Matrix} {Eigenvalue} {Problem.}}, journal = {Numerische Mathematik}, pages = {152--153}, publisher = {mathdoc}, volume = {13}, year = {1969}, zbl = {0186.05703}, url = {http://geodesic.mathdoc.fr/item/NUMA_1969__13_131906/} }
J.E. OSBORN. A Note on a Perturbation Theorem for the Matrix Eigenvalue Problem.. Numerische Mathematik, Tome 13 (1969), pp. 152-153. http://geodesic.mathdoc.fr/item/NUMA_1969__13_131906/