@article{MZ_1964__86_170323,
     author = {Wilhelm Niethammer},
     title = {Relaxation bei komplexen {Matrizen.}},
     journal = {Mathematische Zeitschrift},
     pages = {34--40},
     publisher = {mathdoc},
     volume = {86},
     year = {1964},
     zbl = {0242.65036},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__86_170323/}
}