1. W. Casey: ‘A review of processing aids for PVC’,1986, Metco, M&T Chemicals Inc.
2. D. L. Harrison and J. L. Whitcombe: ‘The role of precipitated calcium carbonate in modifying the behaviour of thermoplastics’, Proc. Conf. on ‘Performance Additives’, London, UK, May 1988, BPI/PRI.
3. Wacker Chemie GmbH: ‘Impact resistant thermoplastic PVC moulding compositions’, Patent 508, 196, 1974.
4. J. T. Lutz Jr: ‘Impact modification of PVC’; 1985, Rohm & Haas. SPE RETEC, Atlanta, GA, USA.