@article{NUMA_1968__11_131835,
     author = {R.S. VARGA and H.I. MEDLEY},
     title = {On {Smallest} {Isolated} {Gerschgorin} {Disks} for {Eigenvalues.} {III.}},
     journal = {Numerische Mathematik},
     pages = {361--369},
     publisher = {mathdoc},
     volume = {11},
     year = {1968},
     zbl = {0164.17701},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1968__11_131835/}
}