1. C.F. Vermaak, The Platinum-Group Metals: A Global Perspective (Randburg, South Africa: Mintek, 1995).
2. T. Kendall, Platinum 2004 (London, England: Johnson Matthey, 2004), www.platinum.matthey.com.
3. R.T. Jones, “Platinum Smelting in South Africa,” South African Journal of Science, 95 (November/December 1999), pp. 525–534; www.mintek.co.za/Pyromet/Files/Platinum.pdf.
4. Special Publication;A.M. Edwards,1987
5. R.T. Jones, “ConRoast: DC Arc Smelting of Dead-Roasted Sulphide Concentrates,” Sulfide Smelting 2002, ed. R.L. Stephens and H.Y. Sohn (Warrendale, PA: TMS, 2002), pp. 435–456; www.mintek.co.za/Pyromet/Files/ConRoast.pdf.