1. Fraunhofer and alia. Mapping and analyses of the current and future (2020-2030) heating/cooling fuel deployment (fossil/renewables) ENER/C2/2014-641; 2015.
2. EU Energy in Figures. Statistical Pocketbook 2019. Luxembourg: Publications Office of the European Union. Available online: https://ec.europa.eu/energy/en/data-analysis/energy-statistical-pocketbook.
3. International Energy Agency – IEA, Energy efficiency market report 2015, OECD/IEA; 2015.
4. L. Gynther, B. Lapillonne, K. Pollier, Energy Efficiency Trends and Policies in the Household and Tertiary Sectors – An Analysis Based on the ODYSSEE and MURE Databases, June 2015. Available online: http://www.odyssee-mure.eu/publications/br/energy-efficiency-trends-policies-buildings.pdf.
5. Improving the energy performance of residential buildings: a literature review;De Boeck;Renew. Sustain. Energy Rev.,2015