28. Fung, Y. C. and Sechler, E. E., "Instability of Thin Elastic 

 Shells," Preceedings of the First Symposium on Naval Structural 

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29. Southwell, R. V., "On the General Theory of Elastic Stability," 

 Phil. Trans., Vol. 213A, 1913, pp. 187-224. 



30. Von Mises, R., "The Critical External Pressure of Cylindrical 

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 (Aug 1933). 



31. Tokugawa, T., "Model Experiments on the Elastic Stability of 

 Closed and Cross-Stiffened Circular Cylinders under Uniform External 

 Pressure," Proc. World Engrg. Congress, Tokyo (1929) Vol. 29, 



pp. 249-279. 



32. Windenburg, D. F. and Trilling, C, "Collapse by Instability of 

 Thin Cylindrical Shells under External Pressure," Experimental Model 

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33. Von Sanden, K. and Tdlke, F., "On Stability Problems in Thin 

 Cylindrical Shells," Ingenieur- Archiv, Vol. 3, pp. 24-66 (1932). See also 

 David Taylor Model Basin Translation 33 (Dec 1949). 



34. Salerno, V. L. and Levine, B. , "Buckling of Circular Cylindrical 

 Shells with Evenly Spaced, Equal Strength Circular Ring Frames. Part I," 

 PIBAL Report 167; "Part II," PIBAL Report 169, Polytechnic Institute of 



■Brooklyn (1950). 



138 



