1. V. F. Zelenskii et al., Problems of Nuclear Science and Technology, Series Physics of Radiation Damage and Radiation Material Behavior [in Russian], No. 1 (2) (1975), p. 8.
2. V. V. Gann et al., Problems of Nuclear Science and Technology. Series Physics of Radiation Damage and Radiation Material Behavior [in Russian], No. 2 (16), 14 (1981).
3. G. Brinkman et al., Int. J. Appl. Rad. Isotopes,32, 13 (1981).
4. N. L. Emets et al., Preprint Kharkov Physicotechnical Institute 72-37 [in Russian], Kharkov (1972).
5. N. L. Emets and Yu. N. Ranyuk, Problems of Nuclear Science and Technology. Series Physics of Radiation Damage and Material Behavior [in Russian], No. 1(9), 31 (1979).