1. The phenomenon of rupture and flow of solids;Griffith;Phil. Trans. R. Soc. London Ser. A,1920
2. Fracture of metals some theoretical considerations;Mott;Engng,1948
3. The moving Griffith crack;Yoffe;Phil. Mag. Ser. 7,1951
4. On the solution of problem of dynamic plane elasticity;Radok;Q. Appl. Math.,1956
5. Some elastodynamic problem of cracks;Sih;Int. J. Fract. Mech.,1967