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2. Proof theory at work: program development in the Minlog system;Benl,1998
3. U. Berger, Continuous functionals of dependent and transfinite types, Habilitationsschrift, Mathematisches Institut der Universität München, 1997
4. Normalization by evaluation;Berger,1998
5. An inverse of the evaluation functional for typed λ-calculus;Berger,1991