1. ISO 6520:1982,Welding. Classification of Imperfections in Metallic Fusion Welds, with Explanations.
2. BSI PD 6493:1991,Guidance of Methods for Assessing the Acceptability of Flaws in Fusion Welded Structures.
3. ISO/DIS 14345,Fatigue Testing of Welded Components.
4. R. E. Peterson,Stress Concentration Design Factors, Wiley, New York-London (1962).
5. STN 05 0211,Heat and Mechanical Treatment of Welded Joints in Unalloyed and Low-Alloy Steels, 10 (1992).