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2. S. Levy, Bending of rectangular plates with large deflections, NACA TR 737, 1942.
3. S. Levy, Square plate with clamped edges under normal pressure producing large deflections, NACA TR 740, 1942.
4. C.-T. Wang, Bending of rectangular plates with large deflections, NACA TN 1462, 1948.
5. A new approach to the analysis of large deflections of plates;Berger;J. Appl. Mech.,1955