1. Clough R. W. and Penzien J. (1975). Dynamics of structures . McGraw‐Hill Book Company.
2. Cundall P. A. (1971). “A computer model for simulating progressive large scale movements in blocky rock systems.” Proc. Symp. Int. Soc. Rock Mech. 8.
3. Cundall P. A. and Strack O. D. L. (1979). “The distinct element method as a tool for research in granular media.” Report submitted to the National Science Foundation concerning grant ENG76‐20711 Part II Oct.
4. Cundall P. A. Drescher A. and Strack O. D. L. (1982). “Numerical experiments on granular assemblies; measurements and observations.” Proc. of the IUTAM Symp. on Deformation and Failure of Granular Materials 355–370.
5. Mustoe G. G. Williams J. R. and Hocking G. (1989). “The discrete element method in geotechnical engineering.” Dynamic behavior of foundations and buried structures P. K. Banerjee and R. Butterfield eds. Elsevier Appl. Sci. 233–264.