@article{NUMA_1970__15_131986,
     author = {J. NiTSCHE},
     title = {Zur {Konvergenz} von {N\"aherungsverfahren} bez\"uglich verschiedener {Normen.}},
     journal = {Numerische Mathematik},
     pages = {224--228},
     publisher = {mathdoc},
     volume = {15},
     year = {1970},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__15_131986/}
}