1. and conf. paper: “Plastic Pipes VI”, Plastic and Rubber Institute, York, U.K., 1985.
2. Studsvik AB, Sweden, unpublished data.
3. Macromolecular Physics, Volume 3, Crystal Melting, Academic Press, New York (1980).
4. Macromolecular Physics, Volume 1, Crystal Structure, Morphology, Defects, Academic Press, New York (1973).