1. Jamrack, W. D. (1963). Rare metal extraction by chemical engineering techniques. New York: Macmillan. (Chapters 2 and 8).
2. Lupis, C. H. P., & Elliott, J. F. (1966). Generalized interaction coefficients. Part I: Definitions. Acta Metallurgica, 14, 529–538.
3. Rosenqvist, T. (1974). Principles of extractive metallurgy. New York: McGraw-Hill. (Chapter 13).
4. Turkdogan, E. T., & Pearson, J. (1953). Activity of constituents of iron and steelmaking slags, Part I, Iron oxide. Journal of the Iron and Steel Institute, 173, 217–223.
5. Davenport, D. W., King, M., Schlesinger, M., & Biswas, A. K. (2002). Extractive metallurgy of copper (4th ed.). Oxford: Pergamon. (Chapters 15 and 16).