Chính. SURVEY RESULTS ON THE VERTICAL LANDING AERODYNAMIC CHARACTERISTICS OF THREE JOINTS HELICOPTER ROTOR AND DETERMINES THE VORTEX RING STATE. JMST [Internet]. 2021 Apr. 12 [cited 2024 Nov. 22];(72):3-9. Available from: https://ojs.jmst.info/index.php/jmst/article/view/73