- Projects and studies for ministries on the federal and state level, companies, associations, etc. project realization and collaboration (selection)
- Climate protection through the use of renewable energy
- Report on experiences: Renewable Energy Law
- MEF (Major Economies Forum on Energy and Climate)
- Survey: Renewable Energy Industry in North Rhine-Westphalia (NRW), years 2010, 2009, 2008 and 2007
- Energy development and demographic change
- Structure of the wind energy research in Germany, unabridged version
- Energy statistics brochure of North Rhine-Westphalia for the years 2011 and 2010
- Evaluation 4th energy research programme
- Offshore wind energy: counselling federal government of Germany
- Location structural analysis: on the areal importance of the renewable energy industry
