1. Green-paper—towards a European strategy for the security of energy supply;European Commission,2000
2. European Parliament and Council. Directive 2018/2002 of 11 December 2018 amending Directive 2012/27/EU on energy efficiency. PE/54/2018/REV/1. Off J Eur, L 328; 2018.
3. Directive 2018/844 of 30 May 2018 amending Directive 2010/31/EU on the energy performance of buildings and Directive 2012/27/EU on energy efficiency. PE/4/2018/REV/1;European Parliament and Council;Off J Eur, L,2018
4. Towards nearly zero-energy buildings: definition of common principles under the EPBD. Ecofys;Hermelink,2013
5. Towards nearly zero-energy buildings: the state-of-art of national regulations in Europe;Annunziata;Energy,2013