1. B. L. Archer, D. Barnard, E. G. Cockbain, P. B. Dickenson and A. I. McMullen, Composition of Hevea Latex, in: “The Chemistry and Physics of Rubber-Like Substances”, L. Bateman, ed., Maclaren & Sons Ltd., London (1963).
2. C. D. Harries, “Untersuchungen uber die Naturlichen und kunstiechen Kaukschukarten”, Springer, Berlin (1919).
3. R. Pummerer, G. Ebermeyer and K. Gerlach, Ber, 64, 809(1931). R. Pummerer, G. Matthews and L. Socias-Vinals, Ber, 69, 170 (1936).
4. M. A. Golub, M.S Hsu and L. A. Wilson, Rubber Chem. Tech., 48, 953 (1975).
5. F. Burton, Product energy in the rubber industry, Elastomerics, 22 (1978).