1. Titow, W. V. PVC Technology, 4th edn. Elsevier Applied Science Publishers, London and New York, 1984.
2. Nass, L. I. Mod. Plast., 40(7) (1963) 151–165.
3. Wells, J. N. J. Cell Plast., 4(3) (1968) 109–112.
4. Gallagher, R. B., Kamens, E. R., Lanse, F. W. & Kamath, V. E. 36th ANTEC SPE Proceedings, 1978, pp. 777–779.
5. Sheppard, C. S., Schack, H. N. & Mageli, O. L. J. Cell. Plast., 2(2) (1966) 97–111.