1. Decision no 406/2009/EC of the European Parliament and of the Council of 23 April 2009 on the effort of member states to reduce their greenhouse gas emissions to meet the community's greenhouse gas emission reduction commitments up to 2020;European Commission;Off J Eur Union,2009
2. European Commission. Europe 2020 – a strategy for smart, sustainable and inclusive growth. COM(2010) 2020 final. 2010. p. 35.
3. European Commission. Conclusions of the Lisbon European Council. SN 100/00, 23–24 March, 2000.
4. European Commission. Communication from the commission to the European Parliament, the council, the European economic and social committee and the committee of the regions energy efficiency plan 2011. COM/2011/0109 final 2011. p. 16.
5. European Commission. Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings. 2010.