1. https://www.impots.gouv.fr/portail/particulier/le-credit-dimpot-transition-energetique.
2. https://www.efficienzaenergetica.enea.it/detrazioni-fiscali/ecobonus.html.
3. Portaria n.° 349-B/2013. Ministério do Ambiente, Ordenamento do Território e Energía. https://data.dre.pt/eli/port/349b/2013/11/29/p/dre/pt/html.
4. Directive 2009/28/EC of the European Parliament and of the Council of 23 April 2009 on the promotion of the use of energy from renewable sources.
5. Analysis of retrofit air source heat pump performance: Results from detailed simulations and comparison to field trial data;Kelly;Energy and Buildings,2011