1. Design of rock slopes against sliding on pre-existing fractures;McMahon,1974
2. Suggested methods for the description of rock masses, joints and discontinuities;Barton;ISRM Working Party, Categories I9,1975
3. Analysis of the genesis and characteristics of jointing in the Nchanga Open Pit for the purpose of ultimately assessing the slope stability;Piteau;Report, Nchanga Consolidated Copper Mines Ltd.,1970
4. Rept., Clause 2, DSS Contract OSV3-0295;Morgenstern,1975
5. The interpretation of geological factors for use in slope theory;Robertson,1970