1. www.ren21.net/status‐of‐renewables/global‐status‐report/2017/06/17.
2. mnre.gov.in/file‐manager/annual‐report/2016‐17/En/pdf/1.pdf.
3. www.nise.res.in.
4. himurja.nic.in/SPP‐2016.pdf.
5. Solar and terrestrial radiation;Angstrom A.;Quarterly Journal of Royal Meteorological Society,1924