Feng, Dinghao, et al. “Optimized Design of the Pneumatic Precision Seed-Metering Device for Carrots”. International Journal of Agricultural and Biological Engineering, vol. 16, no. 6, Feb. 2024, pp. 134-47, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/7911.