1. ADINA system 8.3, release notes. MA, USA: ADINA R&D Inc.; 2005.
2. Stability of structures;Bazant,1991
3. Buckling strength of metal structures;Bleich,1952
4. Effect of compound buckling on compression strength of built-up members;Duan;J Eng (AISC),2002
5. Die Knickfestigkeit gerader Stabe;Engesser;Zentralbl Bauverwaltung,1891