1. A. S. Lodge, Elastic Liquids, Academic Press, New York, 1964.
2. R. B. Bird, R. C. Armstrong and O. Hassager, Dynamics of Polymeric Liquids, Vol 1, John Wiley & Sons, New York, 1987.
3. R. W. Flumerfelt, M. W. Pierick, S. L. Cooper and R. B. Bird, Ind. Eng. Chem. Fundam. 8:354 (1969).
4. S. Middleman, Fundamentals of Polymer Processing, McGraw-Hill, New York (1977), Chapter 6.
5. Z. Tadmor and C. G. Gogos, Principles of Polymer Processing, John Wiley & Sons, N.Y., 1979.