Ismail, S. A. ., A. . Yahya, A. S. . Mat Su, N. . Asib, and A. M. . Mustafah. “Drone Payload and Flying Speed Effects on Rotor Blades’ RPM and Traveling Pattern for Agricultural Chemical Spraying”. Basrah Journal of Agricultural Sciences, vol. 34, Aug. 2021, pp. 157-70, doi:10.37077/25200860.2021.34.sp1.16.