1. P. J. Flory,J. Chem. Phys. 12, 425 (1944).
2. E. A. Guggenheim,Mixtures (Oxford University Press, London, 1952), Chaps. 10?12.
3. I. Prigogine, V. Mathot, and A. Bellemans,The Molecular Theory of Solutions (North Holland, Amsterdam, 1957), Chaps. 16 and 17.
4. P. J. Flory, R. A. Orwoll, and A. Vrij,J. Am. Chem. Soc. 86, 3507, 3515 (1964);
5. P. J. Flory,ibid87, 1833 (1965).