1. R. Szilard, Theory and Analysis of Plates, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1974, p. 36.
2. M. Filonenko-Borodich, Theory of Elasticity, [trans, from Russian, (New York: Dover Publications), pp. 260–268].
3. S. Timoshenko, History of the Strength of Materials ( New York: McGraw-Hill, 1953 ), pp. 119–122.
4. S. Timoshenko, and S. Woinowsky-Krieger, Theory of Plates and Shells, 2nd ed., ( New York: McGraw-Hill, 1959 ), p. 92–97.
5. S. Timoshenko and J. N. Goodier, Theory of Elasticity, 2nd ed., ( New York: McGraw-Hill, 1951 ), pp. 316–317.