1. Council Decision of 25 April 2002 Concerning the approval, on behalf of the European community, of the kyoto protocol to the united nations framework convention on climate change and the joint fulfilment of commitments thereunder (2002/358/CE).
2. Directive 2004/8/EC of the European Parliament and of the Council of 11 February 2004 On the promotion of cogeneration based on a useful heat demand in the internal energy market and amending Directive 92/42/EEC.
3. Directive 2012/27/EU of the European Parliament and of the Council of 25 October 2012 On energy efficiency, amending Directives 2009/125/EC and 2010/30/EU and repealing Directives 2004/8/EC and 2006/32/EC.
4. 639 communication from the commission to the European parliament, the council, the European economic and social committee and the committee of the regions; energy 2020;COM,2010
5. Aspects of support and development of micro-cogeneration in Poland;Chmielewski;Rynek Energii,2014