1. Grafoil, Graphon and UCAR-ZYX are products made by Union Carbide Corp., Carbon Product Div., 270 Park Ave., N.Y., USA. Papyex is a product similar to Grafoil, made by Le Carbon Lorraine, 45 rue des Acacois, 75821, Paris Cedex 17.
2. J. G. Dash, “Films on Solid Surfaces”, Academic Press (1975).
3. J. P. McTague, M. Nielsen, and L. Passell, CRC Crit. Rev. Solid State Mat. Sci. 8: 135 (1978).
4. M. Nielsen, W. D. Ellenson, and J. P. McTague, Neutron Inelastic Scattering, JAEA, Vienna 1977 p. 433.
5. Y. Imry, Phys. Rev. B3, 3939 (1971).