1. Y. G. Lee and R. S. Porter, Polymer Eng. Sci., 26(9), 633 (1986).
2. H. X. Nguyen, Ph.D. Thesis, Case Western Reserve University, 1986.
3. A. J. Waddon, M. J. Hill, A. Keller and D. J. Blundell, J. Mat. Sci., 22, 1773 (1987).
4. G. P. Desio, Textile Research Institute, Notes on Research, no. 417, 1988.
5. S. T. Hardwich, Ph.D. Thesis, Brunel University, UK, 1987.