1. Chemistry of Long-Term Fissionable Elements, A. V. NIKOLAEV (Ed.), Atomizdat, Moscow, 1970.
2. N. M. DYTLOVA, V. Y. TEMTSINA, I. D. KOLPATSOVA, The complexones, Khimiya, Moscow, 1970.
3. V. P. SHVEDOV, A. A. KOPYRIN, V. D. DEMIDOV, Isotopenpraxis, 12 (1976) 429.
4. M. G. KOCHLY—NOTE, CEA, 816 (1967) 381.
5. G. V. KORPUISOV, E. N. PATRUSHEVA, M. S. DOLIDZE, A. E. TRUIBNIKOVA, Radiokhim, 17 (1975) 512.