1. ASTM E1820-23a, Standard Test Method for Measurement of Fracture Toughness, ASTM International, West Conshohocken, PA.
2. ISO 12135:2021, Metallic Materials - Unified Method of Test for the Determination of Quasistatic Fracture Toughness, International Standards Organization, Geneva, Switzerland.
3. A path independent integral and the approximate analysis of strain concentration by notches and cracks;Rice;J. Appl. Mech.,1968
4. Advanced Fracture Mechanics;Kanninen,1985
5. T.L. Anderson, Fracture mechanics: fundaments and applications, third Edition, 2005, CRC Press, Boca Raton, FL.