1. L. P. Suffredini, AD 266?379 (1961).
2. C. F. Zapf, et al, AFM2-TR-65-282 (1965).
3. L. Wohrer, A. Wosilait, Y. Jong, and J. Economy, Paper 5-3, Fifth St. Louis Symposium on Advanced Composites (1971).
4. J. Lusis, R. T. Woodhams, and M. Xanthos, Polymer Eng. Sci. 13 (1973) 139.
5. G. E. Padawer and N. Beecher, ibid 10 (1970) 185.