1. V. F. Zackay, E. R. Parker, D. Fahr, and R. Busch:ASM Trans., 1967, vol. 60, pp. 252–59.
2. W. W. Gerberich, P. L. Hemmings, V. F. Zackay, and E. R. Parker:Fracture, 1969, pp. 288–305, P. L. Pratt, ed., Chapman and Hall, Ltd., London, 1969.
3. J. E. Srawley, M. H. Jones, and B. Gross: Experimental Determination of the Dependence of Crack Extension Force on Crack Length for a Single-Edge-Notch Tension Specimen, NASA TND-2396, 1964.
4. B. Gross and J. E. Srawley: Stress Intensity Factors for Single-Edge-Notch Specimens in Bending or Combined Bending and Tension by Boundary Collocation of a Stress Function, NASA TN D-2603, 1965.
5. W. F. Brown, Jr. and J. E. Srawley: Am. Soc. Testing Mater., Spec. Tech. Publ. no. 410,1966.