1. EU Commission and Parliament, Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (EPBD Recast), Off. J. Eur. Union, 2010, L 153/13, Available online at: http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:153:0013:0035:EN:PDF. (last accessed: October 2015).
2. EU Commission and Parliament Directive 2002/91/EU of the European Parliament and of the Council of 16 December 2002 on the energy performance of buildings, Off. J. Eur. Union, 2003, L 1/65, Available online at: http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32002L0091&from=EN. (last accessed: October 2015).
3. German Government and Parliament, EnEV 2002, Verordnung über energiesparenden Wärmeschutz und energiesparende Anlagentechnik bei Gebäuden (Energieeinsparverordnung – EnEV 2002) (in German), Available online at: http://www.enev-online.info/, (last accessed: October 2015).
4. Italian Government, Legislative Decree 311/2006 of 19 August 2005, Attuazione della direttiva 2002/91/CE relativa al rendimento energetico nell'edilizia (in Italian), Available online at: http://www.camera.it/parlam/leggi/deleghe/05192dl.htm. (last accessed: October 2015).
5. German Government and Parliament, EnEV 2014 − Zweite Verordnung zur Änderung der Energieeinsparverordnung, Bundesgesetzblatt Jahrgang 2013 Teil I Nr 67, ausgegeben zu Bonn am 21. November 2013 (in German).