1. Lewis PR (Course Chair), Design and manufacture with polymers, T838. Post-graduate OU Course in the Manufacturing Programme, 1998, Block 5.2, section 4:47.
2. Lee SM, editor. International encyclopaedia of composites. New York: VCH, 1990: for entry on Processing, void formation in melt flow thermoplastic composites, p. 302.
3. International encyclopaedia of composites. Op cit., for entry on Characterisation, a general review covering X-radiography, OM and SEM.
4. Folkes MJ, Russell DAM. Orientation effects during the flow of short-fibre reinforced thermoplastics. Polymer 1980;21:1252–1258.
5. Peterson RE. Stress concentration factors. John Wiley and Sons, Inc., 1974, Fig 39; also in Pilkey WD, Petersons stress concentration factors 2nd ed. John Wiley and Sons, 1997, Chart 2.29.