1. BSI. PD5500 Unfired fusion welded pressure vessels. London: British Standards Institution; 1999.
2. ASME. ASME Boiler and pressure vessel code sections III and VIII. New York, NY: The American Society of Mechanical Engineers; 2003.
3. CES. EN13445-3:2002 Unfired pressure vessels. Brussels: European Committee for Standardisation; April 2002.
4. Plastic loads for piping branch junctions subjected to combined pressure and in-plane moment loads;Kirkwood;Proc Inst Mech Eng ImechE, Part E, J Process Mech Eng,1994
5. Application of inelastic finite element analysis to pressure vessel design. 8th ICPVT;Mackenzie;Montreal,1996