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4. The structural behaviour of joints in rectangular hollow section;Mee;Ph.D. thesis, University of Sheffield,1969
5. J. Davie and T.W. Giddings, Research into the strength of welded lattice girder joints in structural hollow sections. Report C.E.70/3, Programme 5EC, Comite International pour le Developpement et l'etude de la Construction Tubulaire