1. 1) N. R. Das, S. N. Bhattacharyya : Talanta, 23, 535 (1976).
2. 2) M. J. Nicol, C. A. Fleming, R. L. Paul : "The Extractive Metallurgy of Gold", Edited by G. G. Stanley, p. 831 (1987), (The Southern African Institute of Mining and Metallurgy, Johannesburg).
3. 3) H. Narita, M. Tanaka, K. Morisaku, T. Abe : Hydrometallurgy, 81, 153 (2006).
4. 4) N. Papaiconomou, G. Vite, N. Goujon, J.-M. Lévêque, I. Billard : Green Chem., 14, 2050 (2012).
5. 5) J. Yang, F. Kubota, Y. Baba, N. Kamiya, M. Goto : Solv. Extr. Res. Dev. Jpn., 21, 89 (2014).