1. Crawford, R. J., Plastics Engineering Pergamon Press, Oxford, 1981.
2. Williams, J. G., Stress Analysis of Polymers, 2nd edn, Longman, London, 1980.
3. Powell, P. C., Engineering with Polymers, Chapman and Hall, London, 1983.
4. British Standard BS4618, Recommendations for the Presentation of Plastics Design Data, Parts 1.1. and 1.1.1, 1970.
5. Darlington, M. W. and Turner, S., Creep of thermoplastics, in Creep of Engineering Materials, C. D. Pomeroy (Ed.), Mechanical Engineering Publications, London, 1978, Ch. 11.