1. E. Stansbery, NASA Orbital Debris Program Office Frequently Asked Questions, NASA, Lyndon B. Johnson Space Center Houston, Texas, 2012.
2. C. Pardini, L. Anselmo, Evolution of the debris cloud generated by the fengyun-1c fragmentation event, in: 20th International Symposium on Space Flight Dynamics, Goddard Space Flight Center Greenbelt, MD, 2007, NASA CP-2007-214158.
3. T. Kelso, CelesTrak, CSSI Center for Space Standards and Innovation, 〈http://celestrak.com/〉, 2012.
4. N.L. Johnson, Orbital debris: the growing threat to space operations, in: 33rd Annual AAS Guidance and Control Conference, Breckenridge, CO, 2010.
5. Physical properties and long-term evolution of the debris clouds produced by two catastrophic collisions in earth orbit;Pardini;Adv. Space Res.,2011