1. J. E. Dutrizac:Proc. Mintek 50, Mintek, Johannesburg, South Africa, in press, 1984.
2. J.E. Dutrizac, R.J.C. MacDonald, and T. R. Ingraham:Metall. Trans., 1970, vol. 1, pp. 225–31.
3. F. J. Ugarte and A.R. Burkin:Leaching and Reduction in Hydrometallurgy, A. R. Burkin, ed., Inst. Min. Metall. London, 1975, pp. 46–53.
4. B. Pesic: Ph.D. Thesis, University of Utah, Salt Lake City, UT, 1982.
5. B. Pesic and F. A. Olson:Metall. Trans. B, 1983, vol. 14B, pp. 577–88.