@article{NUMA_1966__9_131725,
     author = {A.S. HOUSEHOLDER},
     title = {Separation {Theorems} for {Normalizable} {Matrices.}},
     journal = {Numerische Mathematik},
     pages = {46--50},
     publisher = {mathdoc},
     volume = {9},
     year = {1966},
     zbl = {0192.13501},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1966__9_131725/}
}