1. Stewarts, Lloyds, The local crushing strength of RHS junction, in: Report C/E 64/65/1, UK, 1965.
2. Konstruktive Gestaltung Von Knotenpunkten Aus Vierkanthohlprofilen;Bettzieche,1969
3. An Experimental Investigation of Joints in Rectangular Hollow Sections;Eastwood,1970
4. Static tensile tests on T-joints in structural hollow sections - determination of the influence of weld method and type of material;Wardenier,1974
5. Investigation into the static strength of welded T-joints made of rectangular hollow sections;Barentse,1977