1. I. S. Mustafin, V. N. Lenskaya, and R. K. Terekhova, ?The interaction of copper and chromium salts,? Zh. Neorg. Khim., 8, No. 10, 2314?2319 (1963).
2. J. C. Sullivan, ?Complex ion formation between cations. Spectra and identification of Np(V)-Cr(III) complex,? J. Am. Chem. Soc., 84, No. 22, 4256?4259 (1962).
3. A. A. Frolov and A. K. Rykov, ?The interaction of the ions of the pentavalent actinides with multiply charged cations,? Radiokhimiya, 21, No. 3, 329?342 (1979).
4. G. M. Gusakov, I. I. Evdokimov, and R. K. Mazitov, ?Magnetic relaxation of 133Cs nuclei in aqueous solutions of paramagnetic salts,? Zh. Strukt. Khim., 2, No. 4, 710?712 (1971).
5. M. Shporer, R. Poupko, and Z. Luz, ?Complexation of cesium ion with ferric halides in aqueous solution. Evidence from 133Cs NMR,? Inorg. Chem., 11, No. 10, 2441?2443 (1972).