1. ACTeurope. Germany,
http://www.acteurope.de
2. Aero-Tec. CB-5000, Germany.
http://www.aero-tec-helicopter.de
3. Höft & Wessel AG. Hw8615.
http://www.hoeft-wessel.com
4. Buskey, G., Wyeth, G., Roberts, J.: Autonomous helicopter hover using an artificial neural network. In: Proceedings of the IEEE International Conference on Robotics & Automation, Seoul, Korea, May 2001, pp. 1635–1640. IEEE, Los Alamitos (2001)
5. Cavalcante, C., et al.: Design and tuning of a helicopter fuzzy controller. In: Proceedings of IEEE International Conference on Fuzzy Systems, vol. 3, pp. 1549–1554. IEEE, Los Alamitos (1995)