1. Europe's buildings under the microscope,2011
2. Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (EPBD recast).
3. Directive 2002/91/EC of the European Parliament and of the Council of 16 December 2002 on the energy performance of buildings.
4. A roadmap towards intelligent net zero- and positive-energy buildings;Kolokotsa;Solar Energy,2011
5. Net zero energy buildings: a consistent definition framework;Sartori;Energy and Buildings,2012