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@article{MZ_1973__131_171884, author = {Konrad J\"orgens and Joachim Weidmann}, title = {Zur {Existenz} der {Wellenoperatoren.}}, journal = {Mathematische Zeitschrift}, pages = {141--152}, publisher = {mathdoc}, volume = {131}, year = {1973}, zbl = {0252.35061}, url = {http://geodesic.mathdoc.fr/item/MZ_1973__131_171884/} }
Konrad Jörgens; Joachim Weidmann. Zur Existenz der Wellenoperatoren.. Mathematische Zeitschrift, Tome 131 (1973), pp. 141-152. http://geodesic.mathdoc.fr/item/MZ_1973__131_171884/