Dai, Fei, et al. “Measurement and Simulation of the Suspension Velocity of Flax Threshing Material Using CFD-DEM”. International Journal of Agricultural and Biological Engineering, vol. 14, no. 5, Oct. 2021, pp. 230-7, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/6651.