Chen, Chang, et al. “Development of Sorting Methods Based on Physical and Aerodynamic Properties of off-Ground Harvested Almonds”. International Journal of Agricultural and Biological Engineering, vol. 14, no. 2, Apr. 2021, pp. 218-25, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/6090.