@article{GDZPPN00116516X,
title = {On Eigenvalues of Matrices Dependent on a Parameter.},
journal = {Numerische Mathematik},
volume = {6},
year = {1964},
pages = {377-387},
zbl = {0133.26201},
url = {http://dml.mathdoc.fr/item/GDZPPN00116516X}
}
LANCASTER, P. On Eigenvalues of Matrices Dependent on a Parameter.. Numerische Mathematik, Tome 6 (1964) pp. 377-387. http://gdmltest.u-ga.fr/item/GDZPPN00116516X/