1. Van Krevelen, D.W., in: Properties of Polymers, p. 294. Amsterdam: Elsevier 1972
2. For reviews see: Donaruma, L.G., in: Progress in Polymer Science, Vol. 4, p. 1. Oxford: Pergamon Press 1975; Mark, H.F.: Pure Appl. Chem. 16, 201 (1968); Schuerch, C: Adv. Polym. Sci. 10, 173 (1972); Ringsdorf, H.: J. Polym. Sci. Symp. 51, 135 (1975)
3. Ottenbrite, R.M., Regelson, W., in: Encyclopedia of Polymer Science and Technology, Suppl. Vol. 2, p. 118. New York: Wiley Interscience 1977
4. Cornforth, J.W., et al. Nature 168, 150 (1951)
5. Cornforth, J.W., et al.: Tetrahedron 29, 1659 (1973)