1. Comparison of Griffith's theory with Mohr's failure criteria;Clausing;Colo. Sch. Mines Q.,1959
2. Mechanism of brittle fracture of rock-Part 1. Theory of the fracture process;Bieniawski;Int. J. Rock Mech. Min. Sci.,1967
3. An energy criterion for the strength of rock in polyaxial compression;Wiebols;Int. J. Rock Mech. Min. Sci.,1968
4. Axial cleavage fracturing, a significant process in mining and geology;Gramberg;Enging Geol.,1965
5. The phenomenon of rock splitting parallel to the direction of maximum compression in the neighbourhood of a surface;Fairhurst,1966