1. European Commission. Communication from the commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions: 2020 by 2020 Europe’s climate change opportunity. COM (2008) 30 final. Brussels; 2008.
2. Intelligent Energy Agency (IEA). Policy pathways: energy performance certification of buildings – a policy tool to improve, energy efficiency; 2010.
3. European Commission. Proposal for a directive of the European Parliament and of the Council on the energy performance of buildings. COM (2008) 780 final. Brussels; 2008.
4. European Commission. Action plan for energy efficiency: realising the potential. COM (2006) 545 final. Brussels; 2006.
5. European Commission. Directive 2006/32/EC of the European Parliament and of the Council on energy end-use efficiency and energy services and repealing Council Directive 93/76/EEC. Brussels; 2006.