1. President B. Obama, 2010. National Space Policy of the United States of America, released by the President of the United States, Washington, DC, p. 7.
2. Hyde, J.L., Evans, H.J., Hoffman, K.D., et al. International Space Station Micrometeoroid and Orbital Debris Integrated Threat Assessment 12, NASA JSC-65837 Rev. A, Houston, TX, 2010.
3. NASA’s new breakup model of EVOLVE 4.0;Johnson;Adv. Space Res.,2001
4. Collision frequency of artificial satellites: The creation of a debris belt;Kessler;JGR,1978
5. LEGEND – A three-dimensional LEO-to-GEO debris evolutionary model;Liou;Adv. Space Res.,2004