@article{NUMA_1989__56_2-3_133387,
     author = {Richard S. Varga and Xiezhang Li},
     title = {A {Note} on the {SSOR} and {USSOR} {Iterative} {Methods} {Applied} to {p-Cyclic} {Matrices.}},
     journal = {Numerische Mathematik},
     pages = {109--122},
     publisher = {mathdoc},
     volume = {56},
     number = {2-3},
     year = {1989},
     zbl = {0678.65021},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1989__56_2-3_133387/}
}