1. Nearly Zero Energy Building Refurbishment—A Multidisciplinary Approach;Torcal,2013
2. Impact of energy efficiency measures on the economic value of buildings
3. Zero carbon buildings refurbishment––A Hierarchical pathway
4. Directive 2012/27/EU of the European Parliament and of the Council of 25 October 2012 on Energy Efficiency, Amending Directives 2009/125/EC and 2010/30/EU and Repealing Directives 2004/8/EC and 2006/32/EC,2012
5. Data Elaborated from IEA Statisticshttp://www.iea.org/