1. G. V. Gorshkov and V. I. Matvienko, Dokl. AN SSSR,116, 211 (1957).
2. B. S. Dzhelepov and L. K. Pekker, Decay Systems of Radioactive Nuclei [in Russian], Moscow-Leningrad, Izd-vo AN SSSR, 1958.
3. B. S. Dzhelepov and L. N. Zyryanova, Uspekhi fiz. nauk,48, 465 (1952).
4. M. A. Bak et al., Trudy RIAN, IX, 107 (1959).
5. A. V. Kogan, Dokl. AN SSSR, 108, 817 (1956).