@article{MZ_1973__135_172015,
     author = {Manfred Wolff},
     title = {\"Uber das {Randspektrum} komplexer ordnungsbeschr\"ankter {Operatoren} in {Banachverb\"anden.}},
     journal = {Mathematische Zeitschrift},
     pages = {293--302},
     publisher = {mathdoc},
     volume = {135},
     year = {1973},
     zbl = {0268.47042},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__135_172015/}
}