E. V. Tikyaa, A. Akinbolati, and M. Shehu, “ASSESSMENT OF EMPIRICAL MODELS FOR ESTIMATING MEAN MONTHLY GLOBAL SOLAR RADIATION IN KATSINA”, FJS, vol. 3, no. 1, pp. 333–344, Apr. 2023, Accessed: Oct. 30, 2025. [Online]. Available: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/1462