Advanced Mechanisms for the Promotion of Renewable Energy: Models for the Future Evolution of the German Renewable Energy Act, DIW-Discussion Paper 826/2008, Osnabrück.

Langniß, O., Lehr, U. & Diekmann, J. (2008): Advanced Mechanisms for the Promotion of Renewable Energy: Models for the Future Evolution of the German Renewable Energy Act, DIW-Discussion Paper 826/2008, Osnabrück. ,