1. T. Hostettler ‘Recensement du marché de l’énergie solaire en 2017’ Swisssolar Office fédéral de l’énergie OFEN Bundesamt für Energie BFE 2018 pp. 1–25.
2. ‘Global Market Outlook 2019–2023’ SolarPower Europe 2020 https://www.solarpowereurope.org/global-market-outlook-2019-2023/.
3. International Energy Agency – Photovoltaic Power Systems Program ‘Trends in PV Applications 2019’ IEA-PVPS 2019 https://iea-pvps.org/trends_reports/2019-edition/.
4. Swiss Federal Office of Energy ‘Energy Strategy 2050’ 2018 https://www.bfe.admin.ch/bfe/en/home/policy/energy-strategy-2050.html.
5. Multifunctional nanostructured materials for next generation photovoltaics