1. A. S. Kobayashi, Experimental Techniques in Fracture Mechanics, published jointly by the Iowa State University Press, Ames, Iowa and the Society for Experimental Stress Analysis, Westport, Connecticut.
2. A path independent integral and the approximate analysis of strain concentration by notches and cracks;Rice;J. appl. Mech.,1968
3. Conservation laws and energy release rates;Budiansky;J. appl. Mech.,1973
4. The J integral as a fracture criterion;Begley,1972
5. J integral estimation procedures;Bucci,1972