Qingqing, Zhou, et al. “Optimization and Test for Structural Parameters of UAV Spraying Rotary Cup Atomizer”. International Journal of Agricultural and Biological Engineering, vol. 10, no. 3, May 2017, pp. 78-86, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/3119.