1. Canadian Aviation Regulations Section 101.01,
http://www.tc.gc.ca/eng/civilaviation/standards/general-recavi-brochures-uav-2270.htm#definition
2. Zaloga, S., Palmer, I.: Unmanned Aerial Vehicles: Robotic Air Warfare 1917-2007. p. 10. Osprey Publishing, UK (2008)
3. http://www.urbanaero.com/Frame-whatsnew.htm
4. http://www.defensenews.com/story.php?i=6508879&c=FEA&s=CVS
5. http://www.peters.ag/Peters-Group-Members/Aircraft-Interiors/Unmanned-Aerial-Vehicles/Unmanned-Aerial-Vehicles.aspx?ID=636