1. Calculation of stress intensity factors at a crack tip using special finite elements;Blackburn,1973
2. Three dimensional elastic singularity element for evaluation of K along an arbitrary crack front;Tracy;Int. J. Fracture,1973
3. On the surface flaw problem. The surface crack;Kobayashi;ASME,1972
4. Calculation of stress intensity factors in two and three dimensions using finite elements;Blackburn,1975
5. The BERSAFE finite element system;Hellen;Computer Aided Design,1974