1. McMillan, W. L., Phys. Rev., 4, 1238 (1971).
2. Flory, P. J., Principles of Polymer Chemistry, 410 (Cornell University Press, NY, 1953).
3. Engelman, D. M., and Rothman, J. E., Nature New Biology, 237, 42 (1972).
4. Melchior, D. L., Morowitz, H. J., Sturtevant, J. M., and Tsong, T. Y., Biochim. Biophys. Acta, 219, 114 (1970).
5. Hanus, J., Phys. Rev., 178, 420 (1969).