@article{NUMA_1975__25_132370,
     author = {R.J. Plemmons},
     title = {Regular {Splittings} and the {Discrete} {Neumann} {Problem.}},
     journal = {Numerische Mathematik},
     pages = {153--162},
     publisher = {mathdoc},
     volume = {25},
     year = {1975},
     zbl = {0319.65028},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1975__25_132370/}
}