M. F. Ramli, S. S. Shamsudin, and M. F. Yaakub, “Sudden Obstacle Appearance Detection by Analyzing Flow Field Vector for Small-Sized UAV”, PAAT, vol. 1, no. 1, pp. 25–35, Dec. 2021, Accessed: May 20, 2024. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/paat/article/view/10331