@article{MZ_1973__133_171951,
     author = {Walter Eberhard and Gerhard Freiling},
     title = {Nicht-S-hermitesche {Rand-} und {Eigenwertprobleme.}},
     journal = {Mathematische Zeitschrift},
     pages = {187--202},
     publisher = {mathdoc},
     volume = {133},
     year = {1973},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__133_171951/}
}