1. Further fatigue tests of 1·5-in-thick butt welds containing slag inclusions;Harrison;British Welding Journal,1968
2. Influence of weld defects on high fatigue behavior;Soete,1969
3. Wellinger, K. & Sturm, D., Influence of weld seam quality on the fatigue resistance under pulsating internal pressure in the case of vessels with nozzles (IIW. Doc. XLL - 578-70).
4. Some problems of establishing acceptance levels for defects in welded pressure vessels;Ardentov,1972