Guo J, Abdullah EJ, Abdul Hamid MF. Review on Passive, Active, and Hybrid Adaptive-Morphing Flapping Wing for Energy Efficient Bird Sized UAV. PAAT. 2025;5(2):42-57. Accessed March 11, 2026. https://penerbit.uthm.edu.my/ojs/index.php/paat/article/view/23403