1. Boiler and Pressure Vessels Code, Section III, Division 1, Subsection NB;ASME,1992
2. BS 5500, Unfired Fusion Welded Pressure Vessels,1988
3. Boiler and Pressure Vessels Code, Section III, Division 1, Code Case N-47;ASME,1992
4. Formulas for Stress and Strain;Roark,1975
5. Theory of Elasticity;Timoshenko,1970