Storm, M.E., R. Gouws, and L.J. Grobler. “Novel Measurement and Verification of Irrigation Pumping Energy Conservation Measures under Incentive-Based Programmes”. Journal of Energy in Southern Africa 29, no. 3 (September 21, 2018): 10–21. Accessed May 8, 2024. https://energyjournal.africa/article/view/3058.