1. W. F. Brown, Jr., and J. E. Srawley, Plane Strain Crack Toughness Testing of High Strength Metallic Materials, ASTM Special Technical Publication No. 410, (1966).
2. ASTM Committee E-24 On Fracture Testing of Metals, Proposed Method of Test for Plane-Strain Fracture Toughness of Metallic Materials, 1969 Book of ASTM Standards, Part 31, pp. 1099–1114.
3. B. Gross, J. E. Srawley, and W. F. Brown, Jr., “Stress Intensity Factors for a Single-edge-notch Tension Specimen by Boundary Collocation of a Stress Function”, NASA TN D-2395,1964.
4. J. H. A. Brahtz, “Stress Distribution in a Reentrant Corner”, Journal of Applied Mechanics, 1, 2 (1933) 31–38.
5. H. M. Westergaard, “Stress at a Crack, Size of the Crack, and Bending of Reinforced Concrete”, Journal of the American Concrete Institute, 5, 2 (1933) 93–102.