Tolong jelaskan mengenai VTOL UAVs dari Pesawat nirawak

History of WWI-era UAVs  - Remote Piloted Aerial Vehicles: The 'Aerial Target' and 'Aerial Torpedo' in the USA

"Human Pilots: Who Needs 'Em?" — Wired News, 23 November 2003

"Drone aircraft may prowl U.S. skies"- c|net News, 29 Mar 2006

Inside the Rise of the Warbots - Interview with Brookings Institution senior fellow Peter W. Singer about his book Wired for War

Drones in Domestic Surveillance Operations: Fourth Amendment Implications and Legislative Responses  Congressional Research Service, September 6, 2012.

Commercial Drones: A Dogfight at the FAA; The aviation agency prepares for a deluge of unmanned aircraft in U.S. skies, February 9, 2012

Integration of Civil Unmanned Aircraft Systems (UAS) in the National Airspace System Roadmap

Unmanned Systems Technology, Directory of UAV technical components

UVS International Non Profit Organization representing manufacturers of unmanned vehicle systems (UVS), subsystems and critical components for UVS and associated equipment, as well as companies supplying services with or for UVS, research organizations and academia.