1. L. R. G. Treloar, “Physics of Rubber Elasticity”, 2nd. Ed., Oxford University Press, London, 1958.
2. G. J. Lake and A. G. Thomas, Proc. Roy. Soc. London A300, 108 (1967).
3. A. N. Gent and R. H. Tobias, J. Polymer Sci., Polymer Phys. Ed. 20, 2051 (1982).
4. J. D. Ferry, “Viscoelastic Properties of Polymers”, 3rd. Ed., Wiley, New York, 1980.
5. L. Mullins, Trans. Inst. Rubber Industry 35, 213 (1959).