Wang, Fangyan, Zhuchuan Qiu, Yongfei Pan, and Guangquan Sun. “DEM-Based Parameter Optimization and Tests of Digging Green Onions”. International Journal of Agricultural and Biological Engineering 16, no. 4 (October 17, 2023): 126–133. Accessed July 26, 2026. https://ijabe.org/index.php/ijabe/article/view/7828.