1. R. B. Seymour: Introduction to Polymer Chemistry, McGraw-Hill, New York, Chapters 3 and 12 (1971).
2. F. W. Billmeyer: Textbook of Polymer Science, Wiley -Interscience, New York, Third Edition (1979).
3. H. P. Boehm: Adv. Catal.
16, 179 (1966).
4. D. G. H. Bollard: Adv. Catal. 23, 263 (1973).
5. G. V. Filonenko, S. B. Grinenko and N. N. Lysova, Katal. Katal.18, 98 (1980).