@article{MZ_1966__92_170537,
     author = {Johannes C.C. Nitsche},
     title = {Zum allgemeinen {Maximumprinzip.}},
     journal = {Mathematische Zeitschrift},
     pages = {70--74},
     publisher = {mathdoc},
     volume = {92},
     year = {1966},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1966__92_170537/}
}