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3. ISO: Static design procedure for welded hollow section joints - Recommendations. ISO 14346, 1st ed., Geneva, Switzerland, 2013.
4. Vegte , G. J. van der Makino , Y. Ultimate strength formulation for axially loaded CHS uniplanar T-joints. International Journal of Offshore and Polar Engineering, ISOPE, vol. 16, No. 4, 2006, pp. 305-312.
5. Vegte , G. J. van der Wardenier , J. Makino , Y. New ultimate strength formulation for axially loaded CHS K-joints. Proc. of 5th International Conference on Advances in Steel Structures, Singapore, vol. II, 2007, pp. 218-227.