1. Watts J, Forrest SA, Clarke B, Atilan O (2008) Future shifts in PGM demand – the impact of technological and economic scenarios on future metal demand. In: Platinum in transformation. SAIMM, Sun City, Johannesburg
2. Matthey J (2016) PGM market report May 2016. Johnson Matthey Technol Rev 60:209–210
3. Kolesnikova M (2013) Russia palladium reserve seen by Johnson Matthey almost gone
4. Mack C, Wilhelmi B, Duncan J, Burgess J (2007) Biosorption of precious metals. Biotechnol Adv 25:264–271
5. Janse van Rensburg S (2016) Guidelines for retreatment of SA gold tailings: MINTEK’s learnings. In: Johannesburg proceedings of the 23rd WasteCon conference. 367–376. [Online], Available: https://iwmsa.co.za/sites/default/files/downloads/56.JansevanRensburg%2CS.pdf