1. Wunderlich, B. andH. Baur, Adv. Polymer Sci.7, 2 (1970).
2. Smit, P. P. A., Rheol. Acta5, 277–283 (1966).
3. van der Vegt, A. K. andP. P. A. Smit, Advances in Polymer Science and Technology. Society of Chemical Industry, London, Monograph 26, p. 313 (1967).
4. Smit, P. P. A. andA. K. van der Vegt, Proceedings of the International Rubber Conference 1967.
5. Smit, P. P. A., Rheol. Acta8, 277–287 (1969).