Shaw, William George, et al. “Holistic Analysis of the Effect on Electricity Cost in South Africa’s Platinum Mines When Varying Shift Schedules According to Time-of-Use Tariffs”. Journal of Energy in Southern Africa, vol. 30, no. 4, Dec. 2019, pp. 26-40, doi:10.17159/2413-3051/2019/v30i4a5675.