Donald J. Kessler and Burton G. Cour-Palais (1978). „Collision Frequency of Artificial Satellites: The Creation of a Debris Belt“. Journal of Geophysical Research (anglų). 83: 2637–2646. Bibcode:1978JGR....83.2637K. doi:10.1029/JA083iA06p02637.
Donald J. Kessler and Burton G. Cour-Palais (1978). „Collision Frequency of Artificial Satellites: The Creation of a Debris Belt“. Journal of Geophysical Research (anglų). 83: 2637–2646. Bibcode:1978JGR....83.2637K. doi:10.1029/JA083iA06p02637.