Wei, Zhang, Niu Zhaojun, Li Lianhao, and Hou Yongrui. 2015. “Design and Optimization of Seedling-Feeding Device for Automatic Maize Transplanter With Maize Straw Seedling-Sprouting Tray”. International Journal of Agricultural and Biological Engineering 8 (6):1-12. https://www.ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/1113.