YONGGUANG, Hu; SHENGZHONG, Liu; WENYE, Wu; JIZHANG, Wang; JIANWEN, Shen. Optimal flight parameters of unmanned helicopter for tea plantation frost protection. International Journal of Agricultural and Biological Engineering, [S. l.], v. 8, n. 5, p. 50–57, 2015. DOI: 10.25165/ijabe.v8i5.1655. Disponível em: https://ijabe.org/index.php/ijabe/article/view/1655. Acesso em: 28 jan. 2026.