1. An experimental study of indexed dull bit-tooth penetration into dry rock under confining pressure;Gnirk;Trans. Am. Inst. Min. Engrs,1967
2. An experimental study of single bit-tooth penetration into dry rock at confining pressures of 0 to 5000 psi;Gnirk;Trans. Am. Inst. Min. Engrs,1965
3. Rock/bit-tooth interaction for conical bit-teeth;Cheatham;Trans. Am. Inst. Min. Engrs,1971
4. Indentation analysis for rock having a parabolic envelope;Cheatham;Int. J. Rock Mech. Min. Sci.,1964
5. On the plastic flow of Coulomb solids beyond original failure;Jenike;J. Appl. Mech.,1959