1. Ultimate Equilibrium of Brittle Bodies with Cracks;Panasiuk,1968
2. The phenomenon of rupture and flow in solids;Griffith;Phil. Trans. Roy. Soc., London, ser. A,1920
3. An analysis of the conditions for rupture due to Griffith cracks;Elliot,1947
4. The distribution of stress in the neighborhood of a crack in elastic solids;Sneddon,1946
5. Strength of ceramic cristals;Gilman,1963