1. North American Specification for the Design of Cold-Formed Steel Structural Members;AISI,2007
2. Cold-formed steel structures;AS/NZS,2005
3. Die Knickfestigkeit gerader Stabe;Engesser;Zentralbl. Bauverwaltung.,1891
4. Buckling Strength of Metal Structures;Bleich,1952
5. Theory of Elastic Stability;Timoshenko,1961