1. J.S. Smart, Jr., “The Effect of Impurities in Copper,” Copper—The Science and Technology of the Metal, Its Alloy and Compounds, ed. Allison Butts (New York: Hafner Publishing Company, 1970), pp. 414–416.
2. S. Abe and Y. Takasawa “Prevention of Floating Slimes Precipitation in Copper Electrorefining,” The Electrorefining and Winning of Copper, ed. James E. Hoffmann (Warrendale, PA: TMS, 1987), pp. 87–98.
3. T.B. Braun, J.R. Rawling, and K.J. Richards, “Factors Affecting the Quality of Electrorefined Cathode Copper” (Paper presented at the International Symp. on Copper Extraction and Refining, Las Vegas, NV, 22–26 February 1976).
4. V. Baltazar and P.L. Claessens, “Factors Affecting Cathode Purity During Copper Electrorefining” (Paper presented at 113th AIME Annual Meeting, Los Angeles, CA, February 1984).