Duan, Dang Trung, and Vu Ngoc Anh. “A Study on Coaxial Rotor Aerodynamics”. VNUHCM Journal of Engineering and Technology 1, no. 3 (September 16, 2019): 18-25. Accessed April 26, 2024. http://stdjet.scienceandtechnology.com.vn/index.php/stdjet/article/view/594.