1. P.J. Flory, Principles of Polymer Chemistry, Cornell University Press, Ithaca NY, 1953.
2. L.R.G. Treloar, The Physics of Rubber Elasticity, Oxford University Press, Clarendon, 1975.
3. J.E. Mark, and B. Erman, Rubberlike Elasticity. A Molecular Primer, Wiley-Interscience, New York, 1988.
4. F. Bueche, Physical Properties of Polymers, Wiley-Interscience, New York, 1962.
5. J.E. Mark, J. Chem. Educ., 58, 898 (1981).