Kose, Oguz, and Tugrul Oktay. “Hexarotor Yaw Flight Control With SPSA, PID Algorithm and Morphing”. International Journal of Intelligent Systems and Applications in Engineering 10, no. 2 (May 27, 2022): 216–221. Accessed September 25, 2022. https://ijisae.org/index.php/IJISAE/article/view/1879.