1. Stress-intensity factors for a single-edge-notch tension specimen by boundary collocation of a stress function;Gross;NASA TN D-2395,1964
2. Stress intensity factors for bend and compact specimens;Srawley;Engng Fract. Mech.,1972
3. Bearing pressures and cracks;Westergaard;J. Appl. Mech.,1939
4. On the stress distribution at the base of a stationary crack;Williams;J. Appl. Mech.,1957
5. Standard recommended practice for R-curve determination. American National Standard. Designation: E561-80.