1. Moore, J. J. (1990). Chemical metallurgy (2nd ed.). Oxford: Butterworth-Heinemann Ltd.. (Chapter 7).
2. Gilchrist, J. D. (1980). Extraction metallurgy (2nd ed.). Oxford: Pergamon. (Chapter 12).
3. Rosenqvist, T. (1974). Principles of extractive metallurgy. New York: McGraw-Hill. (Chapter 8).
4. Coudurier, L., Hopkins, D. W., & Wilkomirski, I. (1978). Fundamentals of metallurgical processes. Oxford: Pergamon. (Chapter 5).
5. Pehlke, R. D. (1973). Unit process of extractive metallurgy. Co, New York: American Elsevier Pub. (Chapter 4).