1. BS 5762:1979, Methods for Crack Opening Displacement (COD) Testing, The British Standards Institution (1979)
2. ASTM E 1290 - 91, Standard Test Method for Crack-Tip Opening Displacement (CTOD) Fracture Toughness Measurement, 1991
3. EGF Recommendations for Determining the Fracture Resistance of Ductile Materials, EGF P1-90, European Group on Fracture, December 1989
4. “A Study about Ji and di in Three-Point Bend Specimens with Deep and Shallow Notches”;Qing-Fen;Eng. Fracture Mechanics,1985
5. M. Koçak, et al, “Evaluation of HAZ Toughness by CTOD and Tensile Panels”, European Symp. on EPFM: Elements of Defect Assessment, Oct. 1989, Freiburg, F.R.G.