1. https.//ec.europa.eu/energy/en/topics/energy-efficiency/buildings.
2. Communication from the Commission of 3 March 2010 − Europe 2020, A strategy for smart, sustainable and inclusive growth [COM(2010) 2020 final—Not published in the Official Journal].
3. Communication from the Commission to the European Parliament, the Council, the Economic and Social Committee and the Committee of the Regions of 8 March 2011–Energy Efficiency Plan 2011 [COM(2011) 109 final—Not published in the Official Journal].
4. Piano d’Azione Italiano per l’Efficienza Energetica (2013).
5. Energy performance of buildings EU Directive (EPBD2) 2010/21/EU.