1. The determination of the complete state of stress in rock in a single borehole-laboratory and underground measurements;Leeman;Int. J. Rock Mech. & Min. Sci.,1968
2. A new method for the complete determination of the state of stress in rock masses;Rocha;Geotechnique,1969
3. A method for measuring the complete in situ stress field in a rock mass;Blackwood,1973
4. Absolute stress investigations in coal at Appin Colliery, New South Wales;Blackwood,1976
5. An instrument to measure the complete stress field in soft rock or coal in a single operation;Blackwood,1977