1. Multiplanar joints. Supplement No. 1, BOMEL TJ Group, Amoco (UK) Exploration Company, September 1991.
2. American Welding Society. Structural Welding Code, AWS D1.1-86, Miami: American Welding Society, Inc., 1992.
3. Guidelines on the numerical determination of stress concentration factors of tubular joints;Romeijn,1993
4. Lab Windows User Manual, Version 2.1. Austin, Texas, USA: National Instruments Corp., 1991.
5. Design of tubular joints for offshore structures, Vol. 2, Publication UR33. London, England: Underwater Engineering Group (UEG), 1985.