1. Thomas S. Johnson, Henry Kelly, Amulya K.N. Reddy, Robert H. William, editors, Renewable energy-“Source for Fuel & Electricity”, Island Press, Washington, D.C., 1993.
2. Renewable energy resources: current status, future prospects and their enabling technology;Ellabban;Renew. Sustain. Energy Rev.,2014
3. G.N. Tiwari, R.K. Mishra, Advance Renewable Energy source, Royal Society of Chemistry, 2012, www.rsc.org.
4. S.P.Sukhatme, J.K. Nayak, Solar Energy Principal of Thermal Collection and Storage, third ed.
5. https://www.worldenergy.org/assets/downloads/Scenarios_Report_FINAL_for_website.pdf, n.d.