Zhang, Xirui, et al. “Design and Experiment of Pneumatic Seed Clearing Mechanism for Pin-Hole Tube Wheat Plot Precision Sowing Device”. International Journal of Agricultural and Biological Engineering, vol. 16, no. 4, Oct. 2023, pp. 85-95, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/8006.