M. Mudasiru, “Estimation of Global Solar Radiation on Horizontal Surface in Kano, Nigeria Using Air Temperature Amplitude”., IJIE, vol. 11, no. 6, pp. 103–109, Sep. 2019, Accessed: Apr. 08, 2026. [Online]. Available: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/1962