1. Bryce Clarke, “Available Cobalt,” Proceedings of the Paul E. Queneau Symposium, Extractive Metallurgy of Copper, Nickel and Cobalt, vol. 1 (Warrendale, PA: TMS, 1993), pp. 1155–1164.
2. Cobalt Development Institute Statistics, 1998.
3. M.J. Hawkins, “Cobalt—A Review of its Supply and End-Use Markets,” (Paper presented at the 36th Annual Conference of Metallurgists of CIM, Sudbury, Canada, August 17–20, 1997).
4. M.J. Hawkins, “Cobalt—The Current Scene” (Paper presented at the Cobalt Conference, London 1996).
5. M.D. Fares et al., “The Calliope Project—Pressure Acid Leaching of Nickel Laterite Ores from New Caledonia,” Hydrometallurgy and Refining of Nickel and Cobalt (Montreal, Canada: MetSoc CIM, 1997), pp. 409–424.