Nwokolo, Samuel, and Julie Ogbulezie. “Performance Evaluation of Existing Sunshine-Based Computing Models for Estimating Global Solar Radiation at Lagos, Nigeria”.
International Journal of Advanced Astronomy 5, no. 2 (October 5, 2017): 106–116. Accessed April 9, 2025.
https://sciencepubco.com/index.php/IJAA/article/view/8308.