@article{NUMA_1966__8_131716,
     author = {T.A. PORSCHING},
     title = {Diagonal  {Similarity} {Transformations} which {Isolate} {Gerschgorin} {Disks.}},
     journal = {Numerische Mathematik},
     pages = {437--443},
     publisher = {mathdoc},
     volume = {8},
     year = {1966},
     zbl = {0145.25102},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1966__8_131716/}
}