KPT Atta, JP Maree, MS Onyango, L Mpenyana-Monyatsi, and M Mujuru, “Chemical phosphate removal from Hartbeespoort Dam water, South Africa ”, WSA, vol. 46, no. 4 October, Oct. 2020, doi: 10.17159/wsa/2020.v46.i4.9074.