1. I. I. Chernyaev, Complex Compounds of Uranium (English translation), Israel program for scientific translation (1966), pp. 101–102.
2. H. R. Hoekstra and J. J. Katz, J. Am. Chem. Soc., 74 (1952) 1683.
3. A. R. Eberle,. M. V. Lerner, C. G. Goldbeck and C. J. Rodden, NBL Report 252 (1970).
4. R. Belcher and C. E. Spooner, J. Chem. Soc. (1943) 313.
5. E. A. Ippolitova et al., Radiokhimiya, 6 (1959) 660.