Pu, Yingjun, Arash Toudeshki, Reza Ehsani, and Fuzeng Yang. 2018. “Design and Evaluation of a Two-Section Canopy Shaker With Variable Frequency for Mechanical Harvesting of Citrus”. International Journal of Agricultural and Biological Engineering 11 (5):77-87. https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/4445.