Atanasov, Asparuh, Radko Mihaylov, Svilen Stoyanov, Desislava Mihaylova, and Peter Benov. “Drone-Based Monitoring of Sunflower Crops”. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA 6, no. 1 (May 18, 2022): 1–9. Accessed October 2, 2025. https://aj.tu-varna.bg/index.php/ajtuv/article/view/258.