Liebenberg, Leon, Douglas Velleman, and Walter Booysen. “A Simple Demand-Side Management Solution for a Typical Compressed-Air System at a South African Gold Mine”. Journal of Energy in Southern Africa 23, no. 2 (May 1, 2012): 20–29. Accessed July 5, 2024. https://journals.assaf.org.za/index.php/jesa/article/view/3159.