1. W. F. Brown and J. E. Srawley,Plane Strain Fracture Toughness Testing, ASTM STP 410. Philadelphia (1967).
2. F. A. McClintock and G. R. Irwin, Plasticity Aspects of Fracture Mechanics,Fracture Toughness Testing and its Applications, ASTM STP 381, Philadelphia (1965).
3. J. R. Rice, Mathematical Analysis in the Mechanics of Fracture,Fracture?An advanced Treatise II, Ed. H. Liebowitz. Academic Press, N.Y., (1968).
4. A. A. Wells, The Application of Fracture Mechanics at a Beyond General Yield,Br. Weld. Res. Ass. Research Report, M13/63 (1963).
5. J. A. H. Hult and F. A. McClintock,Elastic-Plastic Stress and Strain Distributions around Sharp Notches under Repeated Shear, 9th Int. Congress App. Mech., Brussels (1957).