1. L.Gynther B.Lapillone K.Pollier Energy efficiency trends and policies in the household and tertiary sectors. An analysis based on the ODYSSEE and MURE databases 2015 http://www.odyssee-mure.eu/publications/br/energy-efficiency-trends-policies-buildings.pdf(accessed: November 2020).
2. Renewable Energy Agency Renewable energy technologies: Cost analysis series 2012 www.irena.org/Publications(accessed: June 2018).
3. European Parliament 2018 Off. J. Eur. Union
4. Europe’ s buildings under the microscope: A country-by-country review of the energy performance of buildings. Buildings Performance Institute Europe 2011 http://www.bpie.eu/publication/europes-buildings-under-the-microscope/(accessed: November 2020).