1. S. Gray quoted by M. Alderton, in To the Rescue! Why Drones in Police Work Are the Future of Crime Fighting, Line Shape Space Online, https://lineshapespace.com/drones-in-police-work-future-crime-fighting (last accessed April 2016).
2. Forensic Science;Jackson,2016
3. Evidence Core Text;Munday,2013
4. Recommended Guidelines for the use of Unmanned Aircraft, San Diego, CA, USA;International Association of Chiefs of Police Aviation Committee,2012
5. Rotorcraft Downwash Flow Field Study to Understand the Aerodynamics of Helicopter Brownout;Wadcock,2008