1. Sahajpal, V. In Developments in PVC Technology, ed. J. H. L. Henson & A. Whelan). Applied Science Publishers, London, 1973, Ch. 4.
2. Lutz, J. T. In Degradation and Stabilisation of PVC, ed. E. D. Owen. Elsevier Applied Science Publishers, London and New York, 1984, Ch. 6.
3. Petrich, R. P., Effect of processing aids and impact modifiers on processing characteristics of rigid PVC. Paper presented at the PRI International Conference on PVC Processing, Egham Hill, Surrey, UK 6–7 April 1978.
4. Wilson, A. & Raimondi, V. V., Poly-α-methylstyrene as a process aid for rigid polyvinyl chloride. Paper presented at the PRI International Conference on PVC Processing, Egham Hill, Surrey, UK, 6–7 April 1978.
5. Sahajpal, V., Kunststoffe, 66(1) (1976) 18–20.