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2. H. Leaderman, “Elastic and Creep Properties of Filamentous Materials,”Textile Foundation, Washington, D. C., 1943.
3. T. Alfrey, Jr., “Mechanical Behavior of High Polymers,”Interscience Publishers, Inc., New York, 1948.
4. J. D. Ferry, “Viscoelastic Properties of Polymers,”John Wiley and Sons, Inc., New York, 1961.
5. P. S. Theocaris andC. Mylonas, “Viscoelastic Effects in Birefringent Coatings,”Journal of Appl. Mech., 28, 601–607 (1961);also discussion and closure, Journal of Appl. Mechanics, 29, 598–603, 1962.