1. J. Keighley, J. Ind. Text., 15, 89 (1985).
2. G. Lomax, J. Ind. Text., 15, 40 (1985).
3. D. J. Gohlke and J. C. Tanner, J. Ind. Text., 6, 28 (1976).
4. W. Jeong and S. An, J. Mater. Set, 36, 4797 (2001).
5. B. Pause, J. Ind. Text., 25, 311 (1996).