1Makino,Y.et al.,Ultimate capacity of tubular double K-jionts, In Proceedings of 2nd Internatinonal Institute of Welding Conference on Welding of Tebular Structures,Pergamon Press,Boston, 1984.
2Paul,J.C.,The ultimate behavior of muptiplanar TT-and KK-jionts made of circular hollow sections.PHD thesis, 1992.