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Konvergenzraten und optimale Parameterwahl bei der Tikhonov Regularisierung linearer und nichtlinearer inkorrekt gestellter Probleme, Habilitationsschrift, University of Linz, 1988.

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Zur Tikhonov-Regularisierung von linearen Operatorgleichungen, Master's thesis, University of Linz, July 1984.