1. I. N. Plaksin and M. A. Kozhuchova:Compt. Rend. (Dokl.)Acad. Sci. URSS, Doklady Akademii Nauk SSSR, 1941, vol. 31, pp. 671–74.
2. C. K. Chen, T. N. Lung, and C. C. Wan:Hydrometallurgy, 1980, vol. 5, pp. 207–12.
3. A. F. Panchenko, I. A. Kakovskiy, L. A. Shamis, and O. D. Khmel’nitshaya:Izv. Akad. Nauk SSSR, Met., 1975, vol. 6, pp. 32–37.
4. J. C. Huyhua and I. H. Gundiler:Proc. Int. Symp. on Hydrometallurgical Reactor Design and Kinetics, AIME-TMS, Sept. 1986.
5. R. G. Schulze:J. Met., June 1984, pp. 62-65.