D. J. Kessler and B. G. Cour‐Palais, "Collision frequency of artificial satellites: The creation of a debris belt," Journal of Geophysical Research: Space Physics, vol. 83, no. A6, pp. 2637-2646, 1978.
 N. S. Standard, "Guidelines and assessment procedures for limiting orbital debris," NASA NSS, vol. 1740, p. 14, 1995.
 J.-C. Liou, "An active debris removal parametric study for LEO environment remediation," Advances in Space Research, vol. 47, no. 11, pp. 1865-1876, 2011.
 T. D. Bess, "Mass distribution of orbiting man-made space debris," 1975.
 J.-C. Liou, N. L. Johnson, and N. Hill, "Controlling the growth of future LEO debris populations with active debris removal," Acta Astronautica, vol. 66, no. 5-6, pp. 648-653, 2010.
 C. Bonnal, J.-M. Ruault, and M.-C. Desjean, "Active debris removal: Recent progress and current trends," Acta Astronautica, vol. 85, pp. 51-60, 2013.
 J. Liou, "Modeling the large and small orbital debris populations for environment remediation," in 3rd European Workshop on Space Debris Modeling and Remediation, Paris, France, 2014.
 M. F. C. Wiedemann, M. Mockel, Activespacedebrisremoval, in: Deutscher and B. Luft- undRaumfahrtKongress, Germany,2012., “, Active space debris removal," 2012.
 J. L. N. VanderPas, C. Terhes, M. Bernabeu, W. Bauer, Targetselectionand, c. ofmissiondesignforspacedebrisremovalbydlr'sadvancedstudy, and A. group, "Target selection and comparison of mission design for space debris removal," 2014.
 M. Shan, J. Guo, and E. Gill, "Review and comparison of active space debris capturing and removal methods," Progress in Aerospace Sciences, vol. 80, pp. 18-32, 2016.
 D. M. R. Daniel D. Mazanek (1), Joshua B. Hopkins (3), Darren W. Wade (4), Marco Tantardini (5), and Haijun Shen (6), "ENHANCED GRAVITY TRACTOR TECHNIQUE FOR PLANETARY DEFENSE," 4th IAA Planetary Defense Conference – PDC 201513-17 April 2015, Frascati, Roma, Italy, 2015.
 J. T. Olympio∗, "Optimal Control of Gravity-Tractor Spacecraft for Asteroid Deflection," JOURNAL OF GUIDANCE, CONTROL, AND DYNAMICS, 2010.
 S. D. M. A. Alikhani1*, I. Shafieenejad3, "Fault Tolerant Guidance of Under-Actuated Satellite Formation Flying Using Inter-Vehicle Coulomb Force," 2019.
 K. W. M. Bengtson (B), J. Hughes, and H. Schaub, "Survey of the electrostatic tractor research for reorbiting passive GEO space objects," Aerospace Engineering Sciences Department, University of Colorado Boulder, 431 UCB, Boulder, CO 80309, USA, 2018.
 R. Biesbroek, "The e. deorbit study in the concurrent design facility," in The CleanSpace: Workshop, Darmstadt, 2012.
 C. Saunders, A. Chiesa, J. Forshaw, B. Parreira, and R. Biesbroek, "Results of a system feasibility study on a heavy active debris removal mission," 2014.
 K. Wormnes et al., "ESA technologies for space debris remediation," in 6th European Conference on Space Debris, 2013, vol. 1: ESA Communications ESTEC Noordwijk, The Netherlands, pp. 1-8.
 A. Chiesa, F. Fossati, G. Gambacciani, and E. Pensavalle, "Enabling technologies for active space debris removal: The cadet project," in Space Safety is No Accident: Springer, 2015, pp. 29-38.
 K. Yoshida and H. Nakanishi, "The tako (target collaborativize) flyer: a new concept for future satellite servicing," in i-SAIRAS: Int. Symposium on Artificial Intelligence, Robotics and Automation in Space, 2001, pp. 18-22.
 W. McMahan et al., "Field trials and testing of the OctArm continuum manipulator," in Proceedings 2006 IEEE International Conference on Robotics and Automation, 2006. ICRA 2006., 2006: IEEE, pp. 2336-2341.
 I. S. Godage, D. T. Branson, E. Guglielmino, G. A. Medrano-Cerda, and D. G. Caldwell, "Shape function-based kinematics and dynamics for variable length continuum robotic arms," in 2011 IEEE International Conference on Robotics and Automation, 2011: IEEE, pp. 452-457.
 T. Kasai, M. Oda, and T. Suzuki, "Results of the ETS-7 Mission-Rendezvous docking and space robotics experiments," in Artificial Intelligence, Robotics and Automation in Space, 1999, vol. 440, p. 299.
 A. Kauderer, "NASA—Canadarm2 and the mobile servicing system," Internet: http://www. nasa. gov/mission pages/station/structure/elements/mss. html, 2008.
 D. A. Whelan, E. A. Adler, S. B. Wilson III, and G. M. Roesler Jr, "Darpa orbital express program: effecting a revolution in space-based systems," in Small Payloads in Space, 2000, vol. 4136: International Society for Optics and Photonics, pp. 48-56.
 A. Flores-Abad, O. Ma, K. Pham, and S. Ulrich, "A review of space robotics technologies for on-orbit servicing," Progress in Aerospace Sciences, vol. 68, pp. 1-26, 2014.
 D. Reintsema, J. Thaeter, A. Rathke, W. Naumann, P. Rank, and J. Sommer, "DEOS–the German robotics approach to secure and de-orbit malfunctioned satellites from low earth orbits," in Proceedings of the i-SAIRAS, 2010: Japan Aerospace Exploration Agency (JAXA) Japan, pp. 244-251.
 M. Zebenay, R. Lampariello, T. Boge, and D. Choukroun, "A new contact dynamics model tool for hardware-in-the-loop docking simulation," 2012.
 T. Boge, T. Wimmer, O. Ma, and M. Zebenay, "EPOS− A robotics-based hardware-in-the-loop simulator for simulating satellite RvD operations," 2010.
 M. Zebenay, "Development of a robotics-based satellites docking simulator," 2014.
 T. J. D. a. S. P. Dougherty2 and Alliance Spacesystems, "Overview and Performance of the Front-End Robotics Enabling Near-Term Demonstration (FREND) Robotic Arm," 2009.
 T. Debus and S. Dougherty, "Overview and performance of the front-end robotics enabling near-term demonstration (FREND) robotic arm," in AIAA Infotech@ Aerospace Conference and AIAA Unmanned... Unlimited Conference, 2009, p. 1870.
 K. Yoshida, R. Kurazume, and Y. Umetani, "Dual arm coordination in space free-flying robot," in ICRA, 1991, pp. 2516-2521.
 K. Yoshida and H. Nakanishi, "Impedance matching in capturing a satellite by a space robot," in Proceedings 2003 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2003) (Cat. No. 03CH37453), 2003, vol. 4: IEEE, pp. 3059-3064.
 P. M. Dr. Gordon Roesler and D. T. T. Office, "Robotic Servicing of Geosynchronous Satellites (RSGS) Proposers Day," no. FREND, 2016.
 A. Ellery, "A robotics perspective on human spaceflight," Earth, Moon, and Planets, vol. 87, no. 3, p. 173, 1999.
 K. Yoshida, "Achievements in space robotics," IEEE Robotics & Automation Magazine, vol. 16, no. 4, pp. 20-28, 2009.
 B. Bischof, "ROGER-Robotic geostationary orbit restorer," in 54th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law, 2003, p. IAA. 5.2. 08.
 C. Billot, S. Ferraris, R. Rembala, F. Cacciatore, A. Tomassini, and R. Biesbroek, "E. deorbit: feasibility study for an active debris removal," in 3rd European Workshop on Space Debris Modeling and Remediation, Paris, France, 2014.
 M. Lavagna, R. Armellin, R. Bombelli, and R. Benvenuto, "Debris removal mechanism based on tethered nets," in Proceedings‐International Symposium on Artificial Intelligence, Robotics and Automation in Space i‐SAIRAS 2012, 4‐6 September, Turin, Italy, 2012.
 N. Zinner et al., "Junk hunter: Autonomous rendezvous, capture, and de-orbit of orbital debris," in AIAA SPACE 2011 Conference & Exposition, 2011, p. 7292.
 J. Reed, J. Busquets, and C. White, "Grappling system for capturing heavy space debris," in 2nd European Workshop on Active Debris Removal, 2012: Centre National d’Etudes Spatiales Paris, France, pp. 18-19.
 V. Lvov, J. D. Issacs, H. Bradner, G. E. Backus, and A. C. Vine, "Sky-hook: Old idea," Science, vol. 158, no. 3803, pp. 946-947, 1967.
 B. C. Edwards, "Design and deployment of a space elevator," Acta Astronautica, vol. 47, no. 10, pp. 735-744, 2000.
 Y. Chen, R. Huang, X. Ren, L. He, and Y. He, "History of the tether concept and tether missions: a review," International Scholarly Research Notices, vol. 2013, 2013.
 P. Huang, J. Cai, Z. Meng, Z. Hu, and D. Wang, "Novel method of monocular real-time feature point tracking for tethered space robots," Journal of Aerospace Engineering, vol. 27, no. 6, p. 04014039, 2014.
 D. Wang, P. Huang, and J. Cai, "Detumbling a tethered space robot-target combination using optimal control," in 2014 4th IEEE International Conference on Information Science and Technology, 2014: IEEE, pp. 453-456.
 D. Wang, P. Huang, J. Cai, and Z. Meng, "Coordinated control of tethered space robot using mobile tether attachment point in approaching phase," Advances in Space Research, vol. 54, no. 6, pp. 1077-1091, 2014.
 D. Wang, P. Huang, and Z. Meng, "Coordinated stabilization of tumbling targets using tethered space manipulators," IEEE Transactions on Aerospace and Electronic Systems, vol. 51, no. 3, pp. 2420-2432, 2015.
 P. Huang, X. Xu, and Z. Meng, "Optimal trajectory planning and coordinated tracking control method of tethered space robot based on velocity impulse," International Journal of Advanced Robotic Systems, vol. 11, no. 9, p. 155, 2014.
 Z. Meng and P. Huang, "Coordinated approach control method of tethered space robot system," in 2013 IEEE 8th Conference on Industrial Electronics and Applications (ICIEA), 2013: IEEE, pp. 1314-1318.
 P. Huang, D. Wang, Z. Meng, and Z. Liu, "Post-capture attitude control for a tethered space robot-target combination system," Robotica, vol. 33, no. 4, p. 898, 2015.
 F. Zhang, I. Sharf, A. Misra, and P. Huang, "On-line estimation of inertia parameters of space debris for its tether-assisted removal," Acta astronautica, vol. 107, pp. 150-162, 2015.
 V. Aslanov and V. Yudintsev, "Dynamics of large space debris removal using tethered space tug," Acta Astronautica, vol. 91, pp. 149-156, 2013.