1. A. M. Parshin et al., Vopr. At. Nauki. Tekh., Ser. Fiz., Rad. Povrezhd. Rad. Mater., No. 2(10), 70 (1979).
2. V. F. Zelenskii et al., in: Some Problems of the Physics of Radiational Damage of Materials [in Russian], Naukova Dumka, Kiev (1979), p. 95.
3. Yu. N. Sokurskii et al., Vopr. At. Nauki Tekh., Ser. Fiz. Rad. Povrezhd Rad. Mater., No. 2(13), 39 (1980).
4. A. S. Nikiforov, At. Énerg.,53, No. 1, 3 (1982).
5. H. Böhm, A. Hauck, and G. Hess, J. Nucl. Mater.,33, 347 (1969).