1. Electricity From Renewable Resources: Status, Prospects, and Impediments;National Research Council,2010
2. U.S. Energy Information Administration, Solar explained: photovoltaics and electricity, 2019. .
3. REN21, Renewables 2019 Global Status Report, REN21 Secretariat, Paris, 2019.
4. Alternative Energy Systems and Applications;Hodge,2010
5. Renewable Energy: Technology, Economics and Environment;Kaltschmitt,2007