1. Abdelkhalik, O.O., Mortari, D., 2005. Reconnaissance Problem Using Genetic Algorithms. In: Paper AAS 05–184 of the 2005 Space Flight Mechanics Meeting Conference. Copper Mountain, Colorado.
2. Orbit Design for Ground Surveillance Using Genetic Algorithms;Abdelkhalik;J. Guidance Control Dyn.,2006
3. On the n-Impulse Orbit Transfer Using Genetic Algorithms;Abdelkhalik;J. Spacecraft Rock.,2007
4. An Introduction to the Mathematics and Methods of Astrodynamics;Battin,1987
5. Clocchiatti, A., 2006. Responsive Space Surveillance using Periodic Close Encounters. MS Thesis Ingegneria Aerospaziale, Politecnico di Milano.