1. Activehouse (2010). http://activehouse.info . Accessed 27 Apr 2010.
2. Alkemade, F., & Hekkert, M. (2009). Development paths for emerging innovation systems: Implications for environmental innovations. University of Utrecht, ISU working paper 09.08.
3. Atanasiu, B. (2010). Session 3: Integration of RES & RUE in new buildings—towards net-zero energy buildings, presentation on ‘Buildings for the Future’, Brussels, May 6, 2010. http://www.erec.org/fileadmin/erec_docs/Events_Documents/Buildings_for_the_future/3.5.Atanasiu.pdf . Accessed 1 Jun 2010.
4. Attia, S., & De Herde, A. (2010). Towards a definition for zero impact buildings. In Proceedings of sustainable buildings CIB 2010, Maastricht, the Netherlands.
5. BBLV (2010). Energiecharter voor de bouwsector. Information (in Dutch) on http://www.bondbeterleefmilieu.be/campaign.php/13 . Accessed 14 Sep 2010.