1. Begley, J. A. and J. D. Landes (1972). The J Integral as a Fracture Criterion. In Fracture Toughness, ASTM STP 514, American Society for Testing and Materials, pp.1–20.
2. Bucci, R. J. and co-workers (1972). J Integral Estimation Procedures. In Fracture Toughness, ASTM STP 514, American Society for Testing and Materials, pp.40–69.
3. Conservation Laws and Energy-Release Rate;Budiansky;Trans. ASME, Ser. E,1973
4. An application of finite element techniques to post-yield analysis of proposed standard three-point bend fracture test pieces;Hayes;Int. Journ. of Fracture,1974
5. Landes, J. D. and J. A. Begley (1974). Test Resuts from J-Integral Studies: An Attempt to Establish a JIc Testing Procedure. In Fracture Analysis, ASTM STP 560, American Society for Testing and Materials, pp.170–186.