Chokwe, TB, and SM Mporetji. “Organophosphorus Flame Retardants in Surface and Effluent Water Samples from the Vaal River Catchment, South Africa: Levels and Risk to Aquatic Life”. Water SA 45, no. 3 July (July 31, 2019). Accessed January 26, 2022. https://watersa.net/article/view/6744.