Musapatika, Evans, Maurice Onyango, and Ochieng Aoyi. “Cobalt(II) Removal from Synthetic Wastewater by Adsorption on South African Coal Fly Ash”. South African Journal of Science 106, no. 9/10 (October 1, 2010): 7 pages. Accessed May 3, 2024. https://sajs.co.za/article/view/10118.