1. Bearing pressures and cracks;Westergaard;J. appl. Mech.,1939
2. Analysis of stresses and strain near the end of a crack traversing a plate;Irwin;J. appl. Mech.,1948
3. A path independent integral and the approximate analysis of strain concentration by notches and cracks;Rice;J. appl. Mech.,1968
4. The J-integral as a fracture criterion;Begley;ASTM STP,1972
5. Some further J-integral analysis and estimates;Rice;Progress in Flow Growth and Toughness, ASTM STP,1973