1. L. Merino, A. Ollero, J. Ferruz, J. R. Martinez-de-Dios, and B. Arrue, “Motion analysis and Geolocation for aerial monitoring in the COMETS multi-UAV system,” Proc. ICAR 2003, Coimbra, Portugal, 2003.
2. K. Nordberg, P. Doherty, G. Farneback, P.-E. Forssen, G. Granlund, A. Moe, and J. Wiklund, “Vision for a UAV helicopter” Proc. of IROS’02, Workshop on Aerial Robotics, October 2002.
3. N. Metni and T. Hamel, “Visual tracking control of aerial robotic systems with adaptive depth estimation,” International Journal of Control, Automation, and Systems, vol. 5, no. 1, pp. 51–60, February 2007.
4. S. Yi, B. Choi, and N. Ahuja, “Real-time omni-directional distance measurement with active panoramic vision,” International Journal of Control, Automation, and Systems, vol. 5, no. 2, pp. 184–191, April 2007.
5. S.-C. Han, H. Bang, and C.-S. Yoo, “Proportional navigation-based collision avoidance for UAVs,” International Journal of Control, Automation, and Systems, vol. 7, no. 4, pp. 553–565, 2009.