1. 1) J. O. Marsden, C. I. House, “The Chemistry of Gold Extraction”, 2nd ed., The Society for Mining Metallurgy and Exploration Inc. (2006).
2. 2) “Solvent Extraction Principles and Practice”, 2nd ed., ed. by J. Rydberg, M. Cox, C. Musikas, G. R. Choppin, CRC Press (2004).
3. 3) Y. Xiong, H. Kawakita, J. Inoue, M. Abe, K. Ohto, K. Inoue, H. Harada, Solvent Extr. Res. Dev., Jpn., 17, 151-162 (2010).
4. 4) H. Narita, M. Tanaka, K. Morisaku, T. Yaita, S. Suzuki, Y. Isomae, T. Abe, Solvent Extr. Res. Dev., Jpn., 12, 123-130 (2005).
5. 5) D. F. C. Morris, M. A. Khan, Talanta, 15, 1301-1305 (1968).