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Ntšolo, M. , Kalumba, D. , Lefu, N. , Letlatsa, G.. "Numerical Modelling of Shear Zone and Its Implications on Slope Instability at Letšeng Diamond Open Pit Mine, Lesotho". World Academy of Science, Engineering and Technology, Open Science Index 124, International Journal of Geological and Environmental Engineering (2017), 11(4), 310 - 319.