1. Thmas C. Nietz, Scott Baber: An Innovative UAV Design, AIAA-2004-6380.
2. AIAA VTOL Systems Committee, VTOL-1968, AIAA-44054-169, (1969).
3. LIU PeiQing: Air propeller theory and its applications, Beijing Aeronautics and Astronautics Press, 2005: 55-65 (in Chinese).
4. Wang Shicun,Helicopter Aerodynamics,Group of aviation professionals needed teaching materials,1985. 1. (in Chinese).
5. LI Jianbo, GAO Zheng. Experimental Investigation on Lift and Drag of Ducted Fan System, Journal of Nanjing University of Aeronautics & Astronautics, 2004, 36(2): 164-168.