1. G. Calundann and M. Jaffe, in Proceedings of The Robert A. Welch Conferences on Chemical Research XXVI. Synthetic Polymers, Houston, Texas, 15 to 17 November, 1982 (R. A. Welch Foundation, Houston, 1983) p. 247.
2. A. Ciferri and I. M. Ward (Eds), ?Ultra-high Modulus Polymers? (Applied Science, London, 1979).
3. A. Zachariades and R. S. Porter (Eds), ?The Strength and Stiffness of Polymers? (Marcel Dekker, New York, 1983).
4. B. Kalb and A. J. Pennings, J. Mater. Sci. 15 (1980) 2584.
5. J. Smook, M. Flinteman and A. J. Pennings, Polym. Bull. 2 (1980) 775.