1. EEG. Renewable Energy Act, EEG 2009. Federal Law Gazette, part I, vol. 49, Federal Ministry of Justice, Bonn; October 2008.
2. Nitsch J et al. Weiterentwicklung der ‘Ausbaustrategie Erneuerbare Energien’ vor dem Hintergrund der aktuellen Klimaschutzziele Deutschlands und Europas. Study for the Federal Ministry for the Environment, Nature Conservation and Nuclear Safety, Stuttgart; 2008.
3. EWI/EEFA. Overall Energy Policy Concept – 2030 (Energiewirtschaftliches Gesamt-konzept 2030), for the BDEW, Institute of Energy Economics Cologne (EWI) and Energy Environment Forecast Analysis (EEFA), Cologne; July 2008.
4. Lindenberger D, Bartels M, Borggrefe F, Bothe D, Wissen R, Hillebrand B, et al. Analysis of energy policy options until 2030 – the case of Germany. 20th World energy congress – DS 3.5 sustainable energy policies, Rome/Italy; November 2007.
5. DENA. Planning of the grid integration of wind energy in Germany onshore and offshore up to the year 2020 (dena grid study), German Energy Agency; February 2005.