1. ASTM Standard E399 (2009). Standard test method for linear-elastic plane-strain fracture toughness KIc of metallic materials. ASTM International, West Conshohocken, PA, USA.
2. ASTM Standard E1820 (2011). Standard test method for measurement of fracture toughness. ASTM International, West Conshohocken, PA, USA.
3. Australian Standard AS 1391 (2007). Metallic materials - Tensile testing at ambient temperature. Standards Australia, GPO Box 476, Sydney, NSW 2001, Australia.
4. Bayram A., Uguz A., Durmus A. (2002) Rapid determination of the fracture toughness of metallic materials using circumferentially notched bars. Journal of Materials Engineering and Performance 11: 571–576
5. Brown, W.F. Jr. (1975). The circumferentially notched cylindrical bar as a fracture toughness test specimen. Technical Paper presented at Symposium on Linear Fracture Mechanics, 29-30 July 1974, Lehigh University, Bethlehem, PA, USA. In: Linear Fracture Mechanics, Envo Publishing Co., Lehigh Valley, PA, USA.