1. McCrum, N.G., B.E. Read undG. Williams, Anelastic and dielectric effects in polymeric solids, S. 353 ff. (London-New York-Sydney 1967).
2. Willbourn, A. H., Trans. Faraday Soc.54, 717 (1958).
3. Schatzki, T. F., Polymer Preprints6, 646 (1965).
4. Boyer, R. F., Rubber Chem. Techn.36, 1303 (1963).
5. Wunderlich, B., J. Chem. Phys.37, 2431 (1962).