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3. O.C. Zienkiewicz, The Finite Element Method, Mc-Graw-Hill Book Co. Ltd, London.
4. Finite Strip Method in the analysis of elastic plates with two opposite simply supported ends;Cheung;Proc. Int. Civil Eng.,1968
5. M.S. Cheung, Y.K. Cheung, Analysis of Curved Box Girder Bridges By Finite Strip Method, Publications International Association for Bridges and structural Engineering, vol. 31-I, pp. 1-20, 1971.