1. “Unmanned aerial vehicle", En.wikipedia.org. [Online]. Available: https://en.wikipedia.org/wiki/Unmanned_aerial_vehicle. [Accessed: 25- Jul- 2017].
2. Modelling and Control of Quadcopter;Luukkonen,2011
3. Control system for unmanned aerial vehicles;Špinka,2007
4. “Different Types of Drones”, Dronepedia, 2017. [Online]. Available: https://dronepedia.xyz/5-different-types-of-drones/. [Accessed: 20-Sep-2017].
5. “Types of Drones - Explore the Different Types of UAV’s”, Electronic circuits and diagram-electronics projects and design, 2017. [Online]. Available: http://www.circuitstoday.com/types-of-drones. [Accessed: 20- Sep- 2017].