1. Quadcopter introduction.
https://en.wikipedia.org/wiki/Quadcopter
2. Gaponov I, Razinkova A (2012) Quadcopter design and implementation as a multidisciplinary engineering course, IEEE, 26 Nov 2012
3. Gheorghiţă D, Vîntu I, Mirea L (2015) Quadcopter control, IEEE, 09 Nov 2015
4. Hoffmann GM, Rajnarayan DG, Waslander SL, Dostal D, Jang JS, Tomlin CJ (2004) The stanford test bed of autonomous rotorcraft for multi agent control (STARMAC) (PDF). In: Proceedings of the 23rd digital avionics system conference, Salt Lake City, UT, pp 12.E.4/1–10
5. Stafford J (2014) How a Quadcopter works|Clay Allen. University of Alaska, Fairbanks. Retrieved 20 Jan 2015