1. A. Björkman, U. Degerstedt, B. Lindblom, and C. Samuelsson: Extraction and Processing for the Treatment and Minimization of Wastes, J. Hager et al., eds., The Minerals, Metals and Material Soc., 1983, pp. 825–42.
2. S.A.I. Mäkipirtii: Process for the selective removal of impurities present in sulphidic complex ores, mixed ores or concentrates, U.S. Pat. 4,242,124, 1980.
3. I. Wilkomirsky, R. Parra, F. Parada, E. Balladares, J. Etcheverry and R. Díaz: 2018, (Unpublished research).
4. O.K. Kubaschewski and C.B. Alcock: Metallurgical Thermochemistry, 5th ed., Pergamon Press, 1979.
5. P. Couwe, P. Minet and R. Sheridan: in Advances in Sulphide Smelting, H.Y. Sohn et al., eds., The AIME Soc. Publ., 1983, pp. 427–49.