1. Structural steel construction in Southern Africa;Dundu;Steel Construction: Design and Research,2011
2. Dutta D, Wardenier J, Yeomans N, Sakae K, Bucak Ö, Packer JA. Design guide for fabrication, assembly and erection of hollow section structures. CIDECT series no. 7. Germany: TÜV-Verlag, Köln; 1998.
3. Wardenier J, Kurobane Y, Packer JA, van der Vegte GJ, Zhao XL. Design guide for circular hollow section joints under predominantly static loading. CIDECT series. 2nd ed.; 2008.
4. Performance of flattened tube connections;Grundy,1991
5. Eimanis AM. Load capacity of innovative tubular x-joints. Monash University, Melbourne: Australia. Masters Thesis; 1993.