1. Strain localization in sand: plane strain versus triaxial compression;Alshibli;Journal of Geotechnical and Geoenvironmental Engineering,2003
2. The material-point method for granular materials;Bardenhagen;Computer methods in applied mechanics and engineering,2000
3. Theory of land locomotion;Bekker,1956
4. Biguri, A., 2019. Perceptually uniform colormaps. URL https://www.mathworks.com/matlabcentral/fileexchange/51986-perceptually-uniform-colormaps.
5. Excavation forces in reduced gravity environment;Boles;Journal of Aerospace Engineering,1997