Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1973__21_132211, author = {H.J. de Vries}, title = {On the {Eigenproblem} for {Normal} {Matrices.}}, journal = {Numerische Mathematik}, pages = {37--42}, publisher = {mathdoc}, volume = {21}, year = {1973}, zbl = {0247.65023}, url = {http://geodesic.mathdoc.fr/item/NUMA_1973__21_132211/} }
H.J. de Vries. On the Eigenproblem for Normal Matrices.. Numerische Mathematik, Tome 21 (1973), pp. 37-42. http://geodesic.mathdoc.fr/item/NUMA_1973__21_132211/