1. 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).
2. M.L. Williams, Journal of Applied Mechanics 19 (1952) 526–528.
3. N.I. Muskhelishvili, Some Basic Problems of the Mathematical Theory of Elasticity, Noordhoof, Leyden (1953).
4. J.C. Newman, ‘An improved method of collocation for the stress analysis of cracked plates with various shaped boundaries’, NASA TN D-6376 (1971).
5. S.K. Chan, I.S. Tuba and W.K. Wilson, Engineering Fracture Mechanics 2 (1970) 1–17.