1. International Energy Agency (IEA). Trends 2014 in photovoltaic application. Report IEA-PVPS T1-25:2014 available at: 〈http://www.iea-pvps.org/index.php?id=3&eID=dam_frontend_push&docID=2150〉, (accessed 10.12.15).
2. International Energy Agency (IEA), Technology Roadmap – Solar Photovoltaic Energy – Edition 2014, available at: 〈https://www.iea.org/publications/freepublications/publication/TechnologyRoadmapSolarPhotovoltaicEnergy_2014edition.pdf〉, 2014 (accessed 10.12.15).
3. International Energy Agency (IEA), PVPS report – A Snapshot of Global PV 1992–2013 – Preliminary Trends Information from the IEA PVPS Programme, Report IEA-PVPS T1-24: 2014b avaialable at: 〈http://www.iea-pvps.org/fileadmin/dam/public/report/statistics/pvps_report_-_a_snapshot_of_global_pv_-_1992-2013_-_final_3.pdf〉, (accessed 10.12.15).
4. Eurostat, Renewable energy statistics, 〈http://epp.eurostat.ec.europa.eu/statistics_explained/index.php/Renewable_energy_statistics#Electricity〉, (accessed 10.12.15).
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. Brussels, 22.1.2014 COM(2014) 15 final.