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3. S. Timoshenko and J. Goodier, ?Theory of Elasticity? (McGraw Hill, London and New York, 1951).
4. A. C. H. Love, ?Mathematical Theory of Elasticity? (University Press, Cambridge, 1944).
5. C. C. Chamis and J. Sendeckyj, Comp. Mat. 2 (1968) 332.