@article{GDZPPN001185071, title = {Eigenvalues of Rayleigh quotient matrices.}, journal = {Numerische Mathematik}, volume = {59}, year = {1991}, pages = {603-614}, zbl = {0737.65037}, url = {http://dml.mathdoc.fr/item/GDZPPN001185071} }
Sun, Ji-guang. Eigenvalues of Rayleigh quotient matrices.. Numerische Mathematik, Tome 59 (1991) pp. 603-614. http://gdmltest.u-ga.fr/item/GDZPPN001185071/