1. Bangia TR, John Mary, Raman VA, Joshi BD (1978) AEE Report BARC-950
2. Jurisk ML (1966) Report NLCO-987
3. Korpak W (1964) Nukleonika 9:1
4. Laurence G (1970) J Inorg Nucl Chem 32:3065
5. Mikhalor VA, Torgor UG, Gilbert EN, Mazolov LN, Nikholaer AG (1971) Proc Internat Solvent Extraction Conference, Hague, London, vol 2, p 1112