1. R. A. Andrievskii et al., Fourth Geneva Conference (1971), Soviet Report 49/R/452.
2. V. S. Karasev et al., At. Énerg.,22, No. 6, 492 (1967).
3. V. M. Kolyada and V. S. Karasev, At. Énerg.,26, No. 1, 55 (1969).
4. J. Becker and C. Harfman, J. Phys. Chem.,57, 157 (1953).
5. E. Ehrlich, J. Phys. Chem.,59, 473 (1955).