1. Rock Fracture under Static Stress Conditions;Hoek,1965
2. Fracture of anisotropic rock;Hoek;Jl S. Afr. Inst. Min. Metall.,1964
3. Fracture of Rocks around Mine Excavations;Barron,1970
4. Fracture and strength of solids;Orowan;Rep. Prog. Phys.,1949