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K. C. Sole, A. Feather, J. Watt, L. J. Bryson, P. F. Sorensen (1998). Commercialisation of the Minataur™ Process:  Commissioning of Harmony Gold Refinery. EPD Congress 1998, B. Mishra (ed.), The Minerals, Metals and Materials Society, Warrendale, PA, US, pp. 175–186.

P. D. Scott, M. W. Johns, M. H. Kotze, G. O. Lewis, K. C. Sole, A. M. Feather (1998). Gold resin technology and mini gold refineries. Third International Gold Symposium, Sociedad Nacional de Minera y Petroleo, Lima, Peru, 12 pp.

A. Feather, K. C. Sole, L. J. Bryson (1997). Gold refining by solvent extraction: the Minataur™ process. Proceedings Extraction Metallurgy Africa ’97, South African Institute of Mining and Metallurgy, Johannesburg, 13 pp.

A. M. Feather, K. C. Sole, L. J. Bryson (1997). The Minataur™ process: An alternative gold refining technology. Randol Gold Forum ’97, Randol International, Golden, CO, pp. 181–185.

A. M. Feather, K. C. Sole, L. J. Bryson (1997). Refinacíon del oro por medio de la extracción con disolventes: el proceso Minataur™. XXII Convencíon Nacional de Minería, Asociación de Ingenerios de Minas, Metalurgistas y Geólogos de México, Acapulco, México, 15 pp.

A. M. Feather, K. C. Sole, L. J. Bryson (1997). Gold refining by solvent extraction―the Minataur™ process. Journal of the South African Institute of Mining and Metallurgy, 97, 169–173.

K. C. Sole, T. L. Ferguson, J. B. Hiskey (1994). Solvent extraction of silver by Cyanex 272, Cyanex 302 and Cyanex 301. Solvent Extraction and Ion Exchange, 12 (5), 1033–1050.

K. C. Sole, P. Qi, J. B. Hiskey (1993). An evaluation of the physicochemical degradation of gold ion-exchange resins in hypochlorite solutions. Metallurgical Transactions, 24B, 17–25.

K. C. Sole, P. Qi, J. B. Hiskey (1992). Physicochemical degradation of gold ion-exchange resins in hypochlorite. Microscopy Research and Technique, 22, 408.

K. C. Sole, R. L. Paul (1986). Refining of gold by the selective dissolution of silver and copper from binary gold alloys, South African Journal of Chemistry, 39, 101–107.