1. European Commission, The European Commission’s priorities (2019). https://commission.europa.eu/strategy-and-policy/priorities-2019-2024_en#documents
2. European Commission, Fourth Report on the State of the Energy Union (2019). https://commission.europa.eu/publications/fourth-report-state-energy-union_en
3. European Commission, Driving energy efficiency in the European building stock: New recommendations on the modernisation of buildings (2019). https://commission.europa.eu/news/driving-energy-efficiency-european-building-stock-new-recommendations-modernisation-buildings-2019-06-21_en
4. European Commission, Commission Recommendation (EU) 2019/1019 of 7 June 2019 on building modernisation (2019). https://eur-lex.europa.eu/legalcontent/EN/TXT/?uri=CELEX:32019H1019