@article{NUMA_1991__59_8_133567,
     author = {Ji-guang Sun},
     title = {Eigenvalues of {Rayleigh} quotient matrices.},
     journal = {Numerische Mathematik},
     pages = {603--614},
     year = {1991},
     volume = {59},
     number = {8},
     zbl = {0737.65037},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1991__59_8_133567/}
}