@article{GDZPPN00116810X, title = {Spectral Properties of a Polynomial Operator.}, journal = {Numerische Mathematik}, volume = {13}, year = {1969}, pages = {247-259}, zbl = {0177.17202}, url = {http://dml.mathdoc.fr/item/GDZPPN00116810X} }
LANCASTER, P.; PATTABHIRAMAN, M.V. Spectral Properties of a Polynomial Operator.. Numerische Mathematik, Tome 13 (1969) pp. 247-259. http://gdmltest.u-ga.fr/item/GDZPPN00116810X/