1. Pi YL, Put BM, Trahair NS (1999) Lateral buckling strengths of cold-formed Z-section beams. Thin-Walled Struct 34(1):65–93
2. Seetharaman S, Natarajan PR, Djugash ACR (1984) Load carrying capacity of Z-purlins with A.C. sheet cladding. In: 7th International specialty conference on cold-formed steel structures
3. Put BM, Pi YL, Trahair NS (1999) Biaxial bending of cold-formed Z-beams. J Struct Eng 125(11):1284–1290
4. Schafer BW (2006) Designing cold-formed steel using the direct strength method. In: Eighteenth international specialty conference on cold-formed steel structures: recent research and developments in cold-formed steel design and construction, pp 475–488
5. Schafer B (2012) Development of DSM direct design formulas for beam-columns. Research report, John-Hopkins University