@article{NUMA_1970__15_131978,
     author = {F.W. SCH\"AFKE},
     title = {Zum {Anwendungsbereich} einiger {Iterationsverfahren.}},
     journal = {Numerische Mathematik},
     pages = {109--121},
     publisher = {mathdoc},
     volume = {15},
     year = {1970},
     zbl = {0197.42902},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__15_131978/}
}