1. N.J. Themelis and H.H. Kellogg, “Principles of Sulfide Smelting,” in Advances in Sulfide Smelting, edit. by H.Y. Sohn, D.B. George and A.D. Zunkel, The Metallurgical Society of AIME, Warrendale, Pennsylvania, 1983, pp. 1–24.
2. H.H. Kellogg and J.M. Henderson, “Energy Use in Sulfide Smelting of Copper,” in Extractive Metallurgy of Copper, edited by J.C. Yannopoulos and J.C. Agarwal, AIME, New York, N.Y., 1976, pp. 373–425.
3. A.V. Vanjukov et al., “Pyrometallurgical Method for Processing Heavy Nonferrous Metal Raw Materials,” U.S. Patent 4,252,560, February 24, 1981.
4. A.V. Vanjukov, V.P. Bystrov, and A.D. Vaskevich, “Versatility, High Operating Rate, Minimum Pollution,” Licensintorg Panorama, V/O Licensintorg, No. 3, Moscow, 1981, pp. 29–30.
5. G. Melcher, “Copper Extraction by the KHD Contop Process,” KHD Humboldt Wedag, Germany, 1982.