1. P. M. Williams andA. D. Yoffe,Phil. Mag. 18 (1968) 555.
2. Idem, Nature 221 (1969) 952.
3. Idem, Radiation Effects 1 (1969) 61.
4. Idem, in ?Radiation Effects in Semiconductors?, edited by J. W. Corbett and G. D. Watkins (Gordon and Breach, New York, 1971) p. 399.
5. A. D. Yoffe, K. J. Howlett andP. M. Williams, in Proceedings of the VIth Annual SEM Symposium (IITRI, Chicago, 1973) p. 301.