1. The failure of linear brittle materials under effective tensile stress;Brown;Rock Mech. Eng. Geol.,1967
2. Rock mechanics principles;Coates;Can. Mines Branch Monogr.,1970
3. The phenomenon of rock splitting parallel to a free surface under compressive stress;Fairhurst,1966
4. Photoelasticity, 2;Frocht,1948
5. Axial cleavage fracturing, a significant process in mining and geology;Gramberg;Eng. Geol.,1965