1. THE EUROPEAN PARLIAMENT AND THE COUNCIL, “DIRECTIVE (EU) 2018/844,” 2018. doi: 10.1007/3-540-47891-4_10.
2. European Union, “Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings,” 2010.
3. THE EUROPEAN COMMISSION, Commission Delegated Regulation (EU) No 244/2012 of 16 January 2012 byestablishing a comparative methodology framework for calculating cost-optimal levels of minimum energy performance requirements for buildings and building elements. 2012, p. 28.
4. Ministry of Economics, “Long-Term Strategy for Building Renovation (Estonia),” 2020. [Online]. Available: https://ec.europa.eu/energy/sites/ener/files/documents/2014_article4_en_latvia.pdf.
5. BPI Europe, “Europe ’ s buildings under the microscope,” 2011. [Online]. Available: http://bpie.eu/wp-content/uploads/2015/10/HR_EU_B_under_microscope_study.pdf%0Ahttp://www.bpie.eu/uploads/lib/document/attachment/20/HR_EU_B_under_microscope_study.pdf.