1. Bagherzadeh-khalkhali, A., & Mirghasemi, A. A. (2004). Investigation of microscopic behavior of particles in direct shear test. In 57th Canadian geotechnical and 5th joint CGS/IAH-CNC conference, Canada.
2. Bathurst, R. J. (1985). A study of stress and anisotropy in idealized granular assemblies (p. 219). Doctoral dissertation, Department of Civil Engineering, Queen’s University, Kingston, Ontario.
3. Chantawarangul, K. (1993). Numerical simulations of three-dimensional granular assembliess (p. 219). Doctoral dissertation, Department of Civil Engineering, University of Waterloo, Waterloo, Ontario, Canada.
4. The influence of confining pressure on the shear strength of compacted rockfill;Charles;Géotechnique,1980
5. Cundall, P. A., Marti, J., Beresford, P., Last, N., & Asgain, M. (1978). Computer modelling of jointed rock masses. Technical Report N-76-4, Dames and Moore.