1. DEA, 2007. Danish Energy Authority. Energy statistics, 〈http://www.ens.dk〉 Visited 2007-03-15.
2. Directive, 2003/54/EC of the European Parliament and of the Council of 26 June 2003 concerning common rules for the internal market in electricity and repealing Directive 96/92/EC.
3. Directive, 2004/8/EC of the European Parliament and of the Council on promotion of cogeneration based on a useful heat demand in the internal energy market and amending Directive 92/42/EEC.
4. EU, 2004. DG Energy and Transport. Quarterly review of European electricity prices. Issue 2: October 2004, European commission.
5. EU, 2006. DG Energy and Transport. Quarterly review of European electricity and gas prices. Issue 7: April 2006, European commission.