1. Agreement between the federal government and the states on common quality standards for subsidizing building and refurbishment of residential buildings. In: Federal Law Gazette II No 19/ 2006.
2. Information theory and an extension of the maximum likelihood principle;Akaike,1973
3. Amendment (2nd) to the Green Electricity Act 2008. In: Federal Law Gazette I No 114/2008.
4. Amendment to the Green Electricity Act 2006. In: Federal Law Gazette I No 105/2006.
5. Amendment to the Housing Improvement Act. In: Federal Law Gazette I No 337/ 1978. 337.