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3. V.Z. Vlasov, Thin Walled Elastic Beams, second ed. (English translation published for US Science Foundation by Israel Program for Scientific Translations), 1961.
4. Theory of Elastic Stability;Timoshenko,1963
5. Finite element analysis of torsional and torsional-flexural stability problems, moments;Barsoum;Int. J. Numer. Methods Engrg.,1970