Kang, Niu, Fang Xianfa, Liu Yangchun, Lü Chengxu, and Yuan Yanwei. 2017. “Optimized Design and Performance Evaluation of an Electric Cup-Chain Potato Metering Device”. International Journal of Agricultural and Biological Engineering 10 (2):36-43. https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/2547.