1. Norris M, Shiels P. Regular national report on housing developments in European countries. Synthesis report. Dublin, Ireland: The Housing Unit; 2004.
2. R. Hartless R. Application of energy performance regulations to existing buildings. Final report of the Task B4, ENPER TEBUC Project, SAVE 4.1031/C/00-018. Watford, UK: Building Research Establishment; 2003.
3. European residential buildings and empirical assessment of the Hellenic building stock, energy consumption, emissions and potential energy savings;Balaras;Build Environ,2007
4. District heating and cooling optimization and enhancement–Towards integration of renewables, storage and smart grid;Li;Renew Sustain Energy Rev,2017
5. Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions. A Policy Framework for Climate and Energy in the Period from 2020 to 2030, 2014. Available online: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=COM%3A2014%3A15%3AFIN (accessed on 06 April 2019).