Chiem, Nguyen Xuan, and Le Tran Thang. “Synthesis of an Orbit Tracking Controller for a 2DOF Helicopter Based on Sequential Manifolds With Stabilization Time in the Presence of Disturbances”. Engineering, Technology & Applied Science Research 14, no. 4 (August 2, 2024): 15083–15089. Accessed April 6, 2025. https://mail.etasr.com/index.php/ETASR/article/view/7512.