Harfina, Dwi Mutiara, Zaini Zaini, and Wisnu Joko Wulung. “Disinfectant Spraying System With Quadcopter Type Unmanned Aerial Vehicle (UAV) Technology As an Effort to Break the Chain of the COVID-19 Virus”. Journal of Robotics and Control (JRC) 2, no. 6 (November 8, 2021): 502–507. Accessed September 6, 2025. https://journal.umy.ac.id/index.php/jrc/article/view/10462.