1. Stresses around a well bore due to internal pressure and unequal geostatic stresses;Galle;J. Soc. Petrol. Eng.,1962
2. The measurement of stress in rock—I, II and III;Leeman;Jl. S. Afr. Inst. Min. Metall.,1964
3. The measurement of stress in rock—I, II and III;Leeman;Jl. S. Afr. Inst. Min. Metall.,1964
4. An investigation of strain-relief methods of measuring rock stress;Hoskins;Int. J. Rock Mech. Min. Sci.,1967
5. Determination of the regional stress field from doorstopper measurements;Bonnechere;Jl. S. Afr. Inst. Min. Metall.,1968