1. E.U. Directive 2009/28/EC on the promotion of the use of energy from renewable sources, 23 April 2009.
2. E.U. Directive 2010/31/EU of the European Parliament and of the Council of on the Energy Performance of Buildings, 19 May 2010.
3. E.U. Directive 2012/27/EU on Energy Efficiency, amending Directives 2009/12/EC and 2010/30/EU and repealing Directives 2004/8/EC and 2006/32/EC, 25 October 2012.
4. E.U. Directive 2012/27/EU on Energy Efficiency, amending Directives 2009/12/EC and 2010/30/EU and repealing Directives 2004/8/EC and 2006/32/EC, 25 October 2012.
5. Seasonal performance evaluation of electric air-to-water heat pump systems;Dongellini;Appl. Therm. Eng.,2015