@article{NUMA_1992__63_1_133685,
     author = {Andreas Frommer and Daniel B. Szyld},
     title = {H-Splittings and two-stage iterative methods.},
     journal = {Numerische Mathematik},
     pages = {345--356},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1992},
     zbl = {0764.65018},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1992__63_1_133685/}
}