1. B. Gross, J.E. Srawley and W.F. Brown, Stress Intensity Factor for a Single-Edge Notch Tension Specimen by Boundary Collocation, NASA TN D-2395 (1965).
2. B. Cross and J.E. Srawley, Stress Intensity Factors for Single-Edge-Notch Specimens in Bending or Combined Bending and Tension, NASA TN D-2603 (1965).
3. B. Gross and J.E. Srawley, Stress Intensity Factors for Three Point Bend Specimens by Boundary Collocation, NASA TN D-3092 (1965).
4. A.S. Kobayashi, R.B. Cherepy and W.C. Kinsel, Journal of Basic Engineering 86 (1964) 681?685.
5. O.L. Bowie, Journal of Applied Mechanics 31 (1964) 208?212.