1. A. S. Crasto and D. P. Anderson in Proceedings of the American Society for Composites, 5th Technical Conference on Composite Materials”, East Lansing, MI, June 1990 (Technomic, Lancaster, PA, 1990) p. 809.
2. M. Endo, J. Mater. Sci. 23 (1988) 598.
3. M. G. Dobb, D. J. Johnson and C. R. Park, ibid. 25 (1990) 829.
4. S. R. Allen, ibid. 22 (1988) 853.
5. M. Endo, personal communication (1990).