1. H.P. Haver and M.M.Wong: U.S. Bureau of Mines, RI 8105, 1976.
2. M.M. Wong, R.G. Sandberg, C.H. Elges, and D.C. Fleck: U.S. Bureau of Mines, RI 8770, 1983.
3. F.W. Schweitzer and R.W. Livingston: Duval’s CLEAR Hydrometallurgical ProcessChloride Electrometallurgy, P.D. Parker, ed., AIME, New York, NY, 1982, pp. 221–27.
4. P.R. Kruesi, F. S. Allen, and J.L. Lake: CYMET Process—Hydrometallurgical Conversion of Base-Metal Sulphides to Pure Metals.CIM Bulletin, June 1973, pp. 81–87.
5. E. Anderson, G. Boe, T. Danielssen, and P. M. Finne:Complex Sulfide Ores, M. J. Jones, ed., Inst. of Mining and Metallurgy, London, 1980, pp. 186–92.