Govender, Paulene, and Venkataraman Sivakumar. “Investigating Diffuse Irradiance Variation under Different Cloud Conditions in Durban, Using K-Means Clustering”. Journal of Energy in Southern Africa 30, no. 3 (September 18, 2019): 22–32. Accessed May 4, 2024. https://energyjournal.africa/article/view/6314.