1. R. Cull, Paper 55, presented at the Rubber Division Meeting, American Chemical Society, Dallas, Texas, April 1988, p. 11.
2. L. Leger, AIAA 21st Aerospace Sciences Meeting, Paper No. 83-0073, January 1983.
3. A. F. Whitaker, ibid., Paper No. 83-2632, October 1983.
4. W. S. Slemp, B. Santos and G. F. Sykes, AIAA Paper No. 85-0421, 1985.
5. D. G. Zimcik, R. C. Tennyson, L. J. Kok and C. R. Maag, in Proceedings of the Third European Symposium on Spacecraft Materials in Space Environment, ESA SP-232, Noordwijk, Netherlands, October 1985.