1. UN Environment and International Energy Agency (2017): Towards a zero-emission, efficient, and resilient buildings and construction sector. Global Status Report 2017. https://www.worldgbc.org/sites/default/files/UNEP%20188_GABC_en%20%28web%29.pdf.
2. Directive 2009/28/EC of the European parliament and of the council of 23 April 2009;Off. J. Eur. Union.,2009
3. United Nations Environmental Program (UNEP), Towards a Life Cycle Sustainability Assessment: Making Informed Choices on Products, United Nations Environmental Program (UNEP) 2011. DTI/1412/PA.
4. Use of LCA as a development tool within early research: challenges and issues across different sectors;Hetherington;Int. J. Life Cycle Assess,2014
5. I.H.P.C. Heat Pump Programme, How Heat Pumps Can Help to Address Today's Key Energy Policy, I.H.P.C. Heat Pump Programme (2011) 1–4. www.heatpumpcentre.org.