1. Toxicological Profile for Zinc;Agency for Toxic Substances and Disease Registry (ATSDR),2005
2. Toxicological Profile for Aluminum;Agency for Toxic Substances and Disease Registry (ATSDR),2008
3. Continentally-derived solutes in shallow Archean water seawater: rare earth element and Nd isotope evidence in iron formation from the 2.9 Ga Pongola supergroup, South Africa;Alexander;Geochem. Cosmochim. Acta,2008
4. Angliss, M., Ashton, P., Cook, C., Deacon, A., Foord, S., Fouche, P., Henning, D., Kleynhans, N., Rodgers, S., Roux, D., Strydom, W., Vink, D., Van der Waal, B., Van Wyk, E., Vlok, W., 2001. State of Rivers Report: Letaba and Luvuvhu Systems. Water Research Commission Report No: TT 165/01, Water Research Commission, Pretoria.
5. Manganese, nickel and strontium bioaccumulation in the tissues of African sharptooth catfish, Clarias gariepinus from the Olifants River, Kruger National Park;Avenant-Oldewage;Koedoe,2000