Zhao, Xiaoshun, et al. “Design and Experiment of the Double-Seed Hole Seeding Precision Seed Metering Device for Peanuts”. International Journal of Agricultural and Biological Engineering, vol. 15, no. 3, June 2022, pp. 107-14, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/6608.