@article{NUMA_1976__26_132424,
     author = {G. Alefeld},
     title = {Zur {Konvergenz} des {Peaceman-Rachford-Verfahrens.}  {-On} the {Convergence} of the {Peaceman-Rachford} {Iterative} {Method.}},
     journal = {Numerische Mathematik},
     pages = {409--420},
     publisher = {mathdoc},
     volume = {26},
     year = {1976},
     zbl = {0336.65021},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1976__26_132424/}
}