1. Alliger, G. and Weissert, F. C., Chapter 3 of Polymer Chemistry of Synthetic Elastomers Part I, (Eds. J. P. Kennedy and E. G. M. Törnqvist), Inter-science, New York (1968).
2. Bahary, W. S., Sapper, D. I. and Lane J. H., Rubber Chem. Technol., 40, 1529 (1967).
3. Binder, J. L., Rubber Chem. Technol., 35, 57 (1962).
4. Blümel, H., Rubber Chem. Technol., 37, 408 (1964).
5. Bruzzone, M., Corradini, G. and Amato, F., Rubber Plastics Age, 46, 278, (1965). (Also in reprints of 3rd Int. Synthetic Rubber Symposium, London 1964.)