Bingliang, Ye, et al. “Optimization Design and Test of Rice Plug Seedling Transplanting Mechanism of Planetary Gear Train With Incomplete Eccentric Circular Gear and Non-Circular Gears”. International Journal of Agricultural and Biological Engineering, vol. 10, no. 6, Nov. 2017, pp. 43-55, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/2712.