1. M. HAÎSSINSKY, Nuclear Chemistry and Its Applications, Addison-Wesley Inc. Reading, 1964, p. 598–601.
2. J. E. STARIK, Grundlagen der Radiochemie, Akademie Verlag, Berlin, 1963, p. 19–22 and 260–316.
3. H. A. C. McKAY, Principles of Radiochemistry, Butterworths, London, 1971, p. 380–382.
4. J. H. FREMLIN, et al., Nature, 180 (1957) 1179.
5. W. VAN DER MARK, H. A. DAS, J. Radioanal. Chem., 23 (1974) 7.