1. Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (recast). Official Journal of the European Union; 18 June 2010.
2. Commission Delegated Regulation (EU) No 244/2012 of 16 January 2012 supplementing Directive 2010/31/EU of the European Parliament and of the Council. Official Journal of the European Union; 21 March 2012.
3. Guidelines accompanying Commission Delegated Regulation (EU) No 244/2012 of 16 January 2012 supplementing Directive 2010/31/EU of the European Parliament and of the Council. Official Journal of the European Union; 19 April 2012.
4. Wittchen KB, Thomsen KE. Implementation of the cost optimal methodology according to the EPBD recast. REHVA Journal 2012.
5. Concerted Action, Cost optimal levels for energy performance requirements - The Concerted Action's input to the Framework Methodology; 2011.