1. Agora Energiewende. https://www.agora-energiewende.de/. Accessed June 15, 2019.
2. Global Market Outlook. For Solar Power 2019-2023. Solar Power Europe. http://www.solarpowereurope.org/wp-content/uploads/2019/05/SolarPower-Europe-Global-Market-Outlook-2019-2023.pdf. Accessed June 15, 2019.
3. Prognoz razvitiya energetiki mira i Rossii 2019 (Energy Forecast for the World and Russia 2019), Makarov, A.A., Mitrova, T.A., and Kulagin, V.A., Eds., Moscow: INEI RAN, Mosk. Shkola Upravl. Skolkovo, 2019.
4. Is Bigger Best in Renewable Energy? Report of Inst. for Local Self-Reliance. https://ilsr.org/report-is-bigger-best/. Accessed June 15, 2019.
5. Daus, Yu.V., Yudaev, I.V., and Stepanchuk, G.V., Reducing the costs of paying for consumed electric energy by utilizing solar energy, Appl. Sol. Energy, 2018, vol. 54, no. 2, pp. 137–141.