1. Utility-Scale Renewable Energy-Market Intelligence Report,2019
2. Solar Resource Data: Solargis,2017
3. Global Market Outlook,2018–2022
4. Utility-Scale Photovoltaic Procedures and Interconnection Requirements
https://digital.library.unt.edu/ark:/67531/metadc828656/m2/1/high_res_d/1051725.pdf