@article{ELMA_1970__25_140971,
     author = {Erwin Kreyszig},
     title = {Ein {Satz} \"uber {Matrixeigenwerte.}},
     journal = {Elemente der Mathematik},
     pages = {60--61},
     publisher = {mathdoc},
     volume = {25},
     year = {1970},
     zbl = {0205.04803},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1970__25_140971/}
}