1. E. Gaube, G. Diedrich and W. Muller, Kunststoffe 66 (1976) 2.
2. A. Gray, J. N. Mallinson and J. B. Price, Plast. Rubb. Process. Appl. 1 (1981) 51.
3. M. K. V. Chan and J. G. Williams, Polymer 24 (1983) 234.
4. R. W. Hertzberg and J. A. Manson, ?Fatigue of Engineering Plastics? (Academic Press, London, 1980).
5. Plastics and Rubber Institute, ?Triannual Conference on Deformation, Yield and Fracture of Polymer?, (1973, 1976, 1979, 1982).