1. Aida S. Kirschner M. &Meissner F.(2015).Collision risk assessment and mitigation strategy for the GSOC GEO satellites. In24th International Symposium on Space Flight Dynamics.Laurel MD.
2. Probability of Collision Between Space Objects
3. Determining satellite close approaches;Alfano S.;Journal of the Astronautical Sciences,1994
4. A Numerical Implementation of Spherical Object Collision Probability
5. Alfano S.(2005b).Beta conjunction analysis tool. InAAS/AIAA Astrodynamics Specialist Conference(pp.2245–2256).Mackinac Island MI.