1. Alarcon, B., Aguado, A., Manga, R., & Josa, A. (2011). A value function for assessing sustainability: application to industrial buildings. Sustainability, 3(1), 35–50. https://doi.org/10.3390/su3010035.
2. Barcelona City Council. (2018). Comprehensive lighting renovation plan 2018-2020. Ecology, Urban Planning, Infrastructures and Mobility. https://ajuntament.barcelona.cat/ecologiaurbana/en/what-we-do-and-why/quality-public-space/lighting-Master-Plan. Accessed 1 March 2018
3. Barcelona City Council. (2020). Contracte de Conservació de les instal·lacions d’enllumenat públic de Barcelona, 2022-2024. GENBA. Direcció d’Energía i Qualitat Ambiental. https://contractaciopublica.gencat.cat/ecofin_pscp/AppJava/portalfileretrieving.pscp?reqCode=retrieveFile&docHash=a7614d41c3053f21de118f28813afb64&fileId=66019606&capId=15937468&idTS=66018009. Accessed 2 September 2020
4. Beccali, M., Bonomolo, M., Lo Brano, V., Ciulla, G., Di Dio, V., Massaro, F., & Favuzza, S. (2019). Energy saving and user satisfaction for a new advanced public lighting system. Energy Conversion and Management, 195, 943–957. https://doi.org/10.1016/j.enconman.2019.05.070.
5. BRE. (2011). Green Public procurement street lighting and traffic lights technical background report. Brussels.