@article{NUMA_1964__6_131599,
     author = {R.S. VARGA and L.A. HAGEMAN},
     title = {Block {Iterative} {Methods} for {Cyclically} {Reduced} {Matrix} {Equations.}},
     journal = {Numerische Mathematik},
     pages = {106--119},
     publisher = {mathdoc},
     volume = {6},
     year = {1964},
     zbl = {0131.14105},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1964__6_131599/}
}