Cao, Yingli, et al. “Effects of Plant Protection UAV-Based Spraying on the Vertical Distribution of Droplet Deposition on Japonica Rice Plants in Northeast China”. International Journal of Agricultural and Biological Engineering, vol. 14, no. 5, Oct. 2021, pp. 27-34, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/5490.