1. J. D. Knight, T. B. Novey, C. V. Cannon, A. Turkevich, Radiochemical Studies. The Fission Products. National Nuclear Energy Series, Div. IV, Vol. 9, Book 3, 1951, p. 326.
2. J. C. Roy, J. J. Hawton,Can. J. Phys., 39 (1961) 1528.
3. K. Lorenzen, D. König,Z. Naturforsch., 16a (1961) 933.
4. K. Vargha, H. Rausch, G. Matok, Hung. Pat. 152. 742, 1968.
5. E. F. Duffek, E. A. Benjamin, C. Mylroie,J. Electrochem. Technol., 3 (1965) 475.