1. ASAE 1996. Compression test of food material of convex shape. In: ASAE Standards, 500–504
2. Cohen, J.D., Lin, M.C., Manocha, D., Ponamgi, M.K. 1994. Interactive and exact collision detection for large-scaled environments. Technical report, Computer Science Department, University of North Carolina, Chapel Hill, NC, NSF MIP-9306208
3. A discrete numerical model for granular assemblies;Cundall;Géotechnique,1979
4. Johnson, K.L. 1985. Contact Mechanics. second ed. Cambridge University Press, New York
5. Lesburg, L., Zhang, X., Vu-Quoc, L., Walton, O.R. 1997. Simplified tangential force–displacement models for a discrete element particle flow code. In: Behringer, R., Jenkins, J. (Eds.), Proceedings of the Third International Conference on Micromechanics of Granular Media, Durham, NC, 18–22 May 1997. Powders and Grains 97, A. A. Balkema Publishers, Brookfield, VT, USA, pp. 307–310