Dai, Fei, et al. “Motion Simulation and Test on Threshed Grains in Tapered Threshing and Transmission Device for Plot Wheat Breeding Based on CFD-DEM”. International Journal of Agricultural and Biological Engineering, vol. 12, no. 1, Feb. 2019, pp. 66-73, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/4458.