1. 1) W. A. Jankola and H. Salomon-de-Friedberg: Iron control Technologies, Third Int. Symp. on Iron Control in Hydrometallurgy, ed. by J. E. Dutrizac and P. A. Riveros, (CIM, Montreal, Quebec, 2006) pp. 343–357.
2. 2) Y. Lee, N. Moon and C. Choi: Proc. 2nd Int. Symp. on Quality in Non-Ferrous Pyrometallurgy, ed. by M. A. Kozlowski, S. A. Argyropoulos and R. W. McBean, (CIM, Montreal, Quebec, 1995) pp. 357–366.
3. 3) N. Kemori, H. Kurokawa and Z. Kozuka: J. Min. Metall. Inst. Japan 102 (1986) 41–47.
4. 4) A. Yazawa: Nonferrous Metallurgy, (The Japan Institute of Metals, Sendai, Japan, 1980) pp. 315–321 (in Japanese).
5. 5) N. Moon, M. Hino, Y. Lee and K. Itagaki: J. Min. Metall. Inst. Japan 113 (1997) 635–640.