1. R. T. Fenner and J. G. Williams, Polym. Eng. Sci., 11, 474–483 (1971)
2. C. J. Rauwendaal, SPE ANTEC, Chicago, 186–299 (1983)
3. J. Dekker, Polytechnisch Tijdschrift (Dutch), 31, 742–746 (1976)
4. C. J. Rauwendaal, SPE ANTEC, Chicago, 151–154 (1983)
5. C. J. Rauwendaal, Plastics Technology, August, 61–63 (1983)