1. Mitigation of CO2 emissions from building stock;Petersdorff,2004
2. Energy Statistics, Danish Energy Authority, 2002 (http://www.ens.dk/sw1366.asp).
3. Supplement 12 to Danish Building Regulations 1995, National Agency for Enterprise and Construction, 2005 (http://www.naec.dk).
4. Assessment of potential for heat savings in the existing residential buildings;Wittchen,2004
5. Criterion to evaluate the “two-fold benefit” of the renovation buildings and their elements;Martinaitis;Energy and Buildings,2004