1. Y. J. McBrierty and I. M. Ward, British J. Appl. Phys., 1, No. 11, 1529 (1968); A. V. Tokarev, V. P. Putyrskii, et al., Mekh. Kompoz. Mater., No. 5, 771?775 (1987).
2. I. M. Ward, J. Polymer Sci., Polymer Symposium, 58, pp. 1?21 (1977).
3. I. Sigiya, S. Kobayashi, and S. Iwayanagi, Rep. Progr. Polymer, Jpn., 23, 585?586 (1980).
4. I. Sigiya, S. Kobayashi and S. Iwayanagi, Polymer J., 14, No. 1, 43?52 (1982).
5. W. W. Moseley, J. Appl. Polymer Sci., 3, No. 9, 266?276 (1960).