1. ASTM E 1820-06. Standard test method for measurement of fracture toughness. Annual book of ASTM standards, vol. 03.01. Philadelphia: American Society for Testing and Materials; 2008.
2. ASTM E 561-05. Standard test method for K–R curve determination. Annual book of ASTM standards, vol. 03.01. Philadelphia: American Society for Testing and Materials; 2008.
3. ASTM E 2472-06. Standard test method for determination of resistance to stable crack extension under low-constraint conditions. Annual book of ASTM standards, vol. 03.01. Philadelphia: American Society for Testing and Materials; 2008.
4. Begley JA, Landes JD. The J-integral as a fracture criterion. In: Fracture toughness, ASTM STP 514; 1972. p. 1–23.
5. Rice JR, Paris PC, Merkle JG. Some further results of J-integral analysis and estimates. In: Progress in flaw growth and fracture toughness testing, ASTM STP 536; 1973. p. 231–45.