1. International Energy Agency.2019Global Status Report for Buildings and Construction Towards a zero‐emissions efficient and resilient buildings and construction sector. ISBN No: 978–92–807‐3768‐4. Retrieved on November 16 2020 fromhttps://www.unep.org/resources/publication/2019‐global‐status‐report‐buildings‐and‐construction‐sector.
2. Buildings Performance Institute Europe – BPIE. (2011 October).Europe's buildings under the microscope. A country‐by‐country review of the energy performance of buildings. Retrieved on November 16 2020 fromhttp://bpie.eu/publication/europes-buildings-under-the-microscope/.
3. Comprehensive study of building energy renovation activities and the uptake of nearly zero‐energy buildings in the EU final report prepared by: Ipsos Belgium Public Affairs Rooigemlaan 2 9000 Gent Belgium PDF ISBN 978–92–76‐14632‐2.https://doi.org/10.2833/14675.MJ-03-19-963-EN-N. (EC–Ipsos 2019). Retrieved on November 20 2020 fromhttps://ec.europa.eu/energy/sites/ener/files/documents/1.final_report.pdf
4. RED. (2018).Directive (EU) 2018/2001 of the European Parliament and of the Council of December 11 2018 on the promotion of the use of energy from renewable sources. Retrieved on April 26 2021 fromhttps://eur-lex.europa.eu/legal-content/EN/TXT/?uri=uriserv:OJ.L_.2018.328.01.0082.01.ENG
5. EPBD. (2018).Directive (EU) 2018/844 of the European Parliament and of the Council of May 30 2018 on the Energy Performance of Buildings. Retrieved on October 12 2020 fromhttps://eur-lex.europa.eu/legal-content/EN/TXT/?uri=uriserv%3AOJ.L_.2018.156.01.0075.01.ENG.