1. E. J. Vandenberg and B. C. Repka, in “Ziegler-Type Polymerizations, in “Polymerization Processes, C. E. Schildknecht, Ed., Wiley, New York, 1977, Chapter 11.
2. A. W. Larcher and D. C. Pease (to E. I. duPont de Neumours & Co.), U. S. Patent 2,816,883, filed Aug. 2, 1951, issued Dec. 17, 1957.
3. J. Boor, Jr., Ziegler-Natta Catalysts and Polymerizations, Academic Press, Inc., New York, 1979.
4. E. J. Vandenberg in Coordination Polymerization, C. C. Price and E. J. Vandenberg, Eds., Plenum Publishing Corp., New York, 1983, pp. 13–19
5. F. M. McMillan, The Chain Straighteners, Macmillan Press Ltd, London, 1979.