1. Multiple modes of shear failure in rock;Patton,1966
2. The effects of surface roughness on the shear strength of joints in rock;Coulson,1970
3. Shearing resistance and deformability of rock discontinuities;Einstein,1981
4. Rock friction—A laboratory investigation;Schneider,1976
5. Design of a water jet drill for development of geothermal resources;Summers;United States Dept. of Energy Report DOE-EY-765-022677.M003,1978