1. Buckling strength of metal structures;Bleich,1952
2. Lateral buckling of eccentrically loaded I-columns;Salvadori;Trans. Am. Soc. Civil. Eng.,1956
3. Theory of elastic stability;Timoshenko,1961
4. Thin-walled elastic beams;Vlasov,1962
5. Structural use of steel- work in building. Part 5. Code of practice for design of cold formed thin gauge sections;BS 5950-5,1997