1. Treloar, L.R.G. (1975) The Physics of Rubber Elasticity, Clarendon Press, Oxford.
2. Ferry, J.D. (1980) Viscoelastic Properties of Polymers, Wiley, New York, Chapter 11.
3. McCrum, N.G., Read, R.E. and Williams, G. (1967) Anelastic and Dielectric Effects in Polymeric Solids, Wiley, New York.
4. Nye, J. (1985) Physical Properties of Crystals, 2nd edn., Oxford University Press.
5. Hearmon, R.F.S. (1961) An Introduction to Applied Anisotropic Elasticity, Clarendon Press, Oxford.