J. M. Daly, Y. Ma, S. L. Waslander, Coordinated landing of a quadrotor on a skid-steered ground vehicle in the presence of time delays, Autonomous Robots, Vol. 38, No. 2, pp. 179-191, 2015.
 Y. Mulgaonkar, Automated recharging for persistence missions with multiple micro aerial vehicles, M.Sc. Thesis, University of Pennsylvania, USA, 2012.
 K. E. Wenzel, A. Masselli, A. Zell, Automatic take off, tracking and landing of a miniature UAV on a moving carrier vehicle. Journal of intelligent & robotic systems, Vol. 61, No. 1-4, pp. 221-238, 2011.
 M. Saska, T. Krajnik, L. Pfeucil. Cooperative μUAV-UGV autonomous indoor surveillance, Proceedings of 9th International Multi-Conference on Systems, Signals and Devices (SSD), Germany, March 20-23, 2012.
 Y. Bi, H. Duan, Implementation of autonomous visual tracking and landing for a low-cost quadrotor. Optik-International Journal for Light and Electron Optics, Vol. 124, No. 18, pp. 3296-3300, 2013.
 P. Benavidez, J. Lambert, A. Jaimes, M. Jamshidi, Landing of an ardrone 2.0 quadcopter on a mobile base using fuzzy logic, Proceedings of 2014 World Automation Congress (WAC), USA, Aug 3-7, 2014.
 C. Yu, J. Cai, Q. Chen, Multi-resolution visual fiducial and assistant navigation system for unmanned aerial vehicle landing, Aerospace Science and Technology, Vol. 67, pp. 249-256, 2017.
 S. Shah, Real-time Image Processing on Low Cost Embedded Computers, Techincal report No. UCB/EECS-2014, 2014.
 Y. H. Shin, S. Lee, J. Seo, Autonomous safe landing-area determination for rotorcraft UAVs using multiple IR-UWB radars, Aerospace Science and Technology, Vol. 69, pp. 617-624, 2017.
 S. Piskorski, N. Brulez, P. Eline, F. Dhaeyer, Ar. drone developer guide, Revision SDK 2.0, Parrot, S.A., 2012.
 J. L. Bowditch, The new American practical navigator, E. & G. W. Blunt, New York, 1857.
 R. E. Kalman, A new approach to linear filtering and prediction problems, Journal of basic Engineering, Vol. 82, No. 1, pp. 35-45, 1960.
 J. Diebel, Representing attitude: Euler angles, unit quaternions, and rotation vectors, Matrix, Vol. 58, No. 15-16, pp. 1-35, 2006.
 S. Mitra, Autonomous quadcopter docking system, Project report, Cornell Uiversity, USA, 2013.
 M. Podhradsky, Visual Servoing for a Quadcopter Flight Control, M.Sc. Thesis, Czech Technical University, Czech Republic, 2012.
 S. Lange, N. Sünderhauf, P. Protzel, Autonomous landing for a multirotor UAV using vision, Proceedings of International Conference on Simulation, Modeling, and Programming for Autonomous Robots, Italy, Nov. 3-4, 2008.
 S. Lin, M. A. Garratt, A. J. Lambert, Monocular vision-based real-time target recognition and tracking for autonomously landing an UAV in a cluttered shipboard environment, Autonomous Robots, Vol. 41, No. 4, pp. 881-901, 2017.
 C. Patruno, M. Nitti, E. Stella, T. D’Orazio, Helipad detection for accurate UAV pose estimation by means of a visual sensor, International Journal of Advanced Robotic Systems, Vol. 14, No. 5, pp. 1-15, 2017.
 T. Krajník, V. Vonasek, D. Fiser, J. Faigl, AR-drone as a platform for robotic research and education, Proceedings of International Conference on Research and Education in Robotics, Czech Republic, June 15-17, 2011.
 S. Garrido-Jurado, R. Munoz-Salinas, F. J. Madrid-Cuevas, M. J. Marin-Jimenez, Automatic generation and detection of highly reliable fiducial markers under occlusion, Pattern Recognition, Vol. 47, No. 6, pp. 2280-2292, 2014.
 S. Suzuki, Topological structural analysis of digitized binary images by border following, Computer Vision, Graphics, and Image Processing, Vol. 30, No. 1, pp. 32-46, 1985.
 N. Otsu, A threshold selection method from gray-level histograms, Automatica, Vol. 11, No. 285-296, pp. 23-27, 1975.
 V. Lepetit, F. Moreno-Noguer, P. Fua, EPnP: An accurate O(n) solution to the PnP problem, International journal of computer vision, Vol. 81, No. 2, pp. 155-166, 2009.
 Z. Zhang, A flexible new technique for camera calibration, IEEE Transactions on pattern analysis and machine intelligence, Vol. 22, No. 11, pp. 1330-1334, 2000.
 T. G. Carreira, Quadcopter automatic landing on a docking station, M.Sc. Thesis, Instituto Superior Técnico, Portugal, 2013.
 K. Ling, Precision Landing of a Quadrotor UAV on a Moving Target Using Low-Cost Sensors, M.Sc. Thesis, University of Waterloo, Canada, 2014.
 G. Bradski, A. Kaehler, Learning OpenCV: Computer vision with the OpenCV library, O'Reilly, 2011.
 C. Patruno, M. Nitti, A. Petitti, E. Stella, T. D’Orazio, A Vision-Based Approach for Unmanned Aerial Vehicle Landing, Journal of Intelligent & Robotic Systems, pp 1-20, 2018.
 L. Wang, X. Bai, Quadrotor Autonomous Approaching and Landing on a Vessel Deck, Journal of Intelligent & Robotic Systems, Vol. 92, No. 1, pp. 125–143, 2018.
 F. Cocchioni, E. Frontoni, G. Ippoliti, S. Longhi, A. Mancini, P. Zingaretti, Visual Based Landing for an Unmanned Quadrotor, Journal of Intelligent & Robotic Systems, Vol. 84, No. 1–4, pp. 511–528, 2016.