1. 1) M. E. Schlesinger, M. J. King, K. C. Sole and W. G. Davenport: Extractive Metallurgy of Copper, (Elsevier, Netherland, 2011), pp. 268-273.
2. 2) K. Shimokawa: Ph.D. thesis, Kyoto University, 2013.
3. 3) T. N. Andersen, C. H. Pitt, and L. S. Livingston: Journal of Applied Electrochemistry, 13 (1983), 429-38.
4. 4) J. E. Dutrizac and T. T. Chen: Proc. Copper 99-Cobre 99 International Conference (1999), vol.3, pp. 383-403.
5. 5) Y. Temmaya, M. Matsumoto and H. Inoue: Journal of MMIJ, 109 (1993), 937-942.