1. Hollow Sections in Structural Applications;Wardenier,2002
2. Design Guide for Circular Hollow Section (CHS) Joints under Predominantly Static Loading;Wardenier,2008
3. EN 1993-1-8: Design of Steel Structures Part 1–8: Design of Joints;CEN,2005
4. Design Recommendations for Hollow Section Joints — Predominantly Statically Loaded. IIW Doc. XV-701-89;International Institute of Welding (IIW),1981
5. Design Recommendations for Hollow Section Joints — Predominantly Statically Loaded. IIW Doc. XV-701–89;International Institute of Welding (IIW),1989