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3. Cox HL. Buckling of thin plates in compression, Aeronautical Research Committee, R.&M. No. 1554; 1933.
4. Versuche zur Ermittlung der mittragenden Breite von verbeulten Blechen;Lahde-Wagner;Luftfahrt-Forchung,1936
5. Stress distribution in stiffened panels under compression;Sechler;J Aeronaut Sci,1937