1. P. H. Geil, “Polymer Single Crystals” (Interscience, New York, London, Sydney, 1963).
2. D. Fox, M. M. Labes and A. Weissberger, “Physics and Chemistry of the Organic Solid State” (Interscience, New York, London, 1965) Ch. 8.
3. B. Wunderlich, “Macromolecular Physics”, Vol. 1 (Academic Press, New York, San Francisco, London, 1976).
4. R. Vieweg, A. Schley and I. A. Schwarz, “Polyolefine. Kunststoff-Handbuch IV” (Hanser Verlag, München, 1969).
5. A. Turner-Jones, J. M. Aizlewood and D. R. Beckett, Makromol. Chem.
75 (1964) 134.