@article{NUMA_1968__12_131888,
     author = {G. Loizou},
     title = {On {Matrices} with a {Checkerboard} {Sign} {Distribution.}},
     journal = {Numerische Mathematik},
     pages = {429--430},
     publisher = {mathdoc},
     volume = {12},
     year = {1968},
     zbl = {0187.09603},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1968__12_131888/}
}