1. G.M. Ritcey, Development of industrial solvent extraction process, in Solvent Extraction: Principles and Practice , 2nd edn. (Marcel Dekker, New York, 2004)
2. K. Biswas, W.G. Davenport, Extractive Metallurgy of Copper, 2nd edn. (Pergamon Press, Elmsford, 1980), p. 322
3. G.M. Ritcey, A.W. Ashbrook, Solvent Extraction in Process Metallurgy. (AIME, 1978), p. 25
4. K. Biswas, W.G. Davenport, Extractive Metallurgy of Copper, 2nd edn. (Pergamon Press, Elmsford, 1980), p. 317
5. M. Cox, Solvent Extraction Principles and Practice, 2nd edn. (CRC Press, 2004), Chapter 11