1. Irwin, G. R., private communication (mid-1950s).
2. A Treatise on the Mathematical Theory of Elasticity;Love,1892
3. Fracture dynamics;Irwin,1948
4. Fracturing and Fracture Dynamics;Irwin;Welding Journal Research Supplement,1952
5. Critical energy rate analysis of fracture;Irwin;Weld. Jour. Res. Sup.,1954