T Mudhiriza, F Mapanda, BM Mvumi, and M Wuta, “Removal of nutrient and heavy metal loads from sewage effluent using vetiver grass, Chrysopogon zizanioides (L.) Roberty”, WSA, vol. 41, no. 4 July, Jul. 2015, doi: 10.4314/wsa.v41i4.04.