1. Abe, A., Goodman, M.: J. Pol. Sci. A1, 2192 (1963)
2. Sundaralingam, M., in: Conformation of Biological Molecules and Polymers (The Jerusalem Symposia of Quantum Chemistry and Biochemistry, Vol. V, E.D. Berman and B. Pullman, eds.). Jerusalem: The Israel Acad. Sci. Human. 1973
3. Deslauriers, R., et al.: J. Amer. Chem. Soc. 97, 5093 (1075)
4. Fetters, L.J., Yu, H.: Macromolecules 4, 385 (1971)
5. Troxell, T.C., Sheraga, H.A.: ibid.