1. D. G. Cherkasov, M. P. Smotrov, and K. K. Il’in, Zh. Fiz. Khim. 84, 1030 (2010) [Russ. J. Phys. Chem. A 84, 922 (2010)].
2. M. Erol, M. Kocak, P. Richter, et al., Ber. Bunsen-Ges. Phys. Chem. 91, 731 (1987).
3. Chemical Encyclopedy, Ed. by I. L. Knunyants (Sov. Entsiklopediya, Moscow, 1988–1998), Vols. 1–5 [in Russian].
4. D. G. Cherkasov, V. F. Kurskii, and K. K. Il’in, Zh. Neorg. Khim. 53, 146 (2008) [Russ. J. Inorg. Chem. 53, 139 (2008)].
5. R. Treybal, Liquid Extraction (McGraw-Hill, New York, 1951; Khimiya, Moscow, 1966).