1. Alexis, K., Nikolakopoulos, G., & Tzes, A. (2010a). Constrained optimal attitude control of a quadrotor helicopter subject to wind gusts: Experimental studies. In 2010 American control conference (pp. 4451–4455), June 30–July 2, Baltimore, USA.
2. Alexis, K., Nikolakopoulos, G., & Tzes, A. (2010b). Design and experimental verification of a constrained finite time optimal control scheme for the attitude control of a quadrotor helicopter subject to wind gusts. In 2010 international conference on robotics and automation (pp. 1636–1641), May 3–8, Anchorage, Alaska, USA.
3. Alexis, K., Nikolakopoulos, G., & Tzes, A. (2010c). Model predictive control for a miniature coaxial helicopter. In 7th IFAC symposium on intelligent autonomous vehicles, article #16094, vol. 7, no. 1, September 6–8, Lecce, Italy.
4. Coordination of helicopter UAVs for aerial Forest-Fire surveillance;Alexis,2009
5. Bouabdallah, S. (2007). Design and Control of quadrotors with application to autonomous flying. Ph.D. dissertation, EPFL STI School of Engineering, Lausanne, Switzerland.