@article{1183548687, author = {Lax, Peter D.}, title = {The multiplicity of eigenvalues}, journal = {Bull. Amer. Math. Soc. (N.S.)}, volume = {6}, number = {2}, year = {1982}, pages = { 213-214}, language = {en}, url = {http://dml.mathdoc.fr/item/1183548687} }
Lax, Peter D. The multiplicity of eigenvalues. Bull. Amer. Math. Soc. (N.S.), Tome 6 (1982) no. 2, pp. 213-214. http://gdmltest.u-ga.fr/item/1183548687/