زلخا ل. ., عمر الخليل, and محسن أحمد. “Effectiveness Evaluation of Using Unmanned Aerial Vehicles (Drones) in Topographic Maps Production”. Tishreen University Journal -Engineering Sciences Series, vol. 46, no. 3, Aug. 2024, pp. 407-26, https://journal.tishreen.edu.sy/index.php/engscnc/article/view/17308.