1. N. J. Gaylord and H. F. Mark, Linear and Stereoregular Addition Polymers, Wiley-Interscience, NewYork, 1959.
2. J. Boor, Junior, Shell Development Company, Ziegler-Natta Catalysts and Polymerization, Academic, New York, 1979.
3. C. Kennedy, ICI The Company That Changed Our Lives, Hutchinson, London, 1986; W. J. Reader, ICI History, Vol. 2, Oxford University Press, 1975.
4. Imperial Chemical Industries, British Patent 471590 (1936).
5. P. H. Spitz, Petrochemicals: The Rise of an Industry, Wiley, New York, 1988.