1. Shaw IG The rise of the predator empire: Tracing the history of U.S drones 2014 https://understandingempire.wordpress.com/2-0-a-brief-history-of-U.S-drones
2. Fahlstrom P Gleason T Introduction to UAV Systems 2012 http://site.ebrary.com/id/10580221?ppg
3. Knight R Drones deliver healthcare. Inside unmanned systems: engineering, policy, and practice 2017 http://insideunmannedsystems.com/drones-deliver-healthcare/
4. Spring T In pictures: 15 current and future uses of drones. Computerworld [Internet] 2017 http://www.computerworld.com.au/slideshow/&/pictures-15-current-future-uses-drones/
5. Wagner L Ready,set,drone:Walmart joins Amazon, Google in testing delivery drones. NPR[Internet] 2017 https://www.npr.org/&/ready-set-drone-walmart-joins-amazon-google-in-testing-delivery-drones