1. A. V. Fokin, E. V. Volkova, and A. D. Sorokin, Khim. Nauka Promyshl.,4, No. 6, 806 (1959).
2. A. V. Fokin, E. V. Volkova, and A. D. Sorokin, Zh. Vses. Khim. O-va im. D. I. Mendeleeva,5, 120 (1960).
3. E. V. Volkova, A. V. Fokin, and V. M. Belikov, Zh. Vses. Khim. O-va im. D. I. Mendeleeva,6, 113 (1961).
4. P. V. Zimakov, E. V. Volkova, A. V. Fokin, A. D. Sorokin, and V. M. Belikov, in: Radioactive Isotopes and Radiation in the Economy of the USSR [in Russian], Gostoptekhizdat, Moscow (1961), Vol. 1, p. 219.
5. E. V. Volkova, A. V. Fokin, and A. D. Sorokin, Proceedings, Second All-Union Conference on Radiochemistry [in Russian], Izd-vo Akad. Nauk SSSR (1962), p. 460.