1. Examination of a Pressure Vessel that Ruptured at the Chicago Refinery of the Union Oil Company on July 23, 1984;McHenry,1986
2. Boiler and Pressure Vessel Code, Section VIII, Pressure vessels,1968
3. Test Method for Evaluation of Pipeline Steels for Resistance to Stepwise Cracking,1984
4. Method for y-Groove Cracking Test, Japanese Industrial Standard, JIS Z 3158, Japan Welding Engineering Society, Tokyo, Japan.