1. Lin X, Ng, T. Numerical modeling of granular soil using random arrays of three-dimensional elastic ellipsoids. In: Siriwardane HJ, Zaman MM, editors. Computer methods and advances in geomechanics. p. 605–10.
2. Mathematical models for determining the intersections of quadric surfaces;Levin;Computer Graphics and Image Processing,1979
3. Numerical simulation of idealized granular assemblies with plane elliptical particles;Rothenburg;Computers and Geotechnics,1991
4. Cundall PA, Strack ODL. The discrete element method as a tool for research in granular media, part II. Report to National Science Foundation. Minneapolis (MN): Department of Civil and Mineral Engineering, University of Minnesota.