@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/