1. Efe, M.Ö. (2007), Robust Low Altitude Behaviour Control of a Quadrotor Rotorcraft through Sliding Modes, Mediterranean Conference on Control and Automation
2. Kojima, R., Ogawara, K., Yoneda, T., Tomoigawa, S., (2008) Delayed Feedback Altitude Control for Micro UAV without Sensing Pitch Rate, International Conference on Control, Automation and Sytems, 316-319
3. Akyurek, S. (2015), Modelling and Loop-Shaping Control Design for Fixed-Wing Unmanned Aerial Vehicles
4. Young, C. M., Lynch, E.E., Boynton, E.R. (1944), Electrical Control in Automatic Pilots, Electrical Engineering IEEE, Volume 63, Issue 12, pp 939
5. Litchford, G.B., Tatz, A., Battle, F.H. Jr. (1959), A Look at the Future of Automatic Landing Systems, IRE Transactions on Aeronautical and Navigational Electronics, 118-128