1. A discrete numerical model for granular assemblies
2. Cundall P. A. and Strack O. D. L. (1983). “Modeling of microscopic mechanisms in granular material.” Mechanics of granular materials: new models and constitutive relation J. T. Jenkins and M. Satake eds. Elsevier Amsterdam The Netherlands 137–149.
3. Dobry R. and Ng T.T. (1992). “Discrete modelling of stress-strain behavior of granular media at small and large strains.” Engineering computations Vol. 9 129–143.
4. Ke T.C. (1993). “Simulated testing of two-dimensional heterogeneous and discontinuous rock masses using discontinuous deformation analysis ” PhD thesis Dept. of Civ. Engrg. Univ. of California Berkeley.
5. Ke T.C. and Bray J. D. (1994). “DDAD—formulation and user manual.” Geotech. Engrg. Rep. No. UCB/GT/94-09 Univ. of California Berkeley.