1. 6) M. Suzuki, R. Kobayashi, K. Nakano, T. Funato and Y. Matsui: Leader-following Formation Navigation with Virtual Trajectories for Dynamic Multi-agents, Trans. ISCIE, 29-8, 382/389 (2016)
2. 8) https://github.com/AutonomyLab/ardrone_autonomy, (accessed 2019-09-24)
3. 9) https://github.com/tum-vision/tum_ardrone, (accessed 2019-09-24)
4. 10) http://www.uco.es/investiga/grupos/ava/node/26, (accessed 2019-09-24)
5. 11) J. Engel, J. Sturm and D. Cremers: Accurate Figure Flying with a Quadrocopter Using Onboard Visual and Inertial Sensing, Proc. Workshop on Visual Control of Mobile Robots (ViCoMoR) at the IEEE/RJS International Conference on Intelligent Robot Systems (IROS), 43/48 (2012)