1. Net Zero Energy Buildings (NZEB): Concepts, Frameworks and Roadmap for Project Analysis and Implementation;Attia,2018
2. Directive 2010/31/EU of the European Parliament and of the Council of 19 May 2010 on the Energy Performance of Buildings
https://eur-lex.europa.eu/legal-content/en/TXT/?uri=CELEX%3A32010L0031
3. Development of the NZEBs Concept in Member States, p. 47
https://ec.europa.eu/jrc
4. Principles for Nearly Zero-Energy Buildings. Paving the Way for Effective Implementation of Policy Requirements
https://www.bpie.eu/publication/principles-for-nearly-zero-energy-buildings/
5. Ecofys: Andreas Hermelink, Sven Schimschar, Thomas Boermans Politecnico di Milano/eERG: Lorenzo Pagliano, Paolo Zangheri, Roberto Armani University of Wuppertal: Karsten Voss, Eike Musall. Towards Nearly Zero Energy Buildings Definition of Common Principles under the EPBD
https://ec.europa.eu/energy/sites/ener/files/documents/nzeb_full_report.pdf