Khalil, Khalil I., and Afaf M. Abd El-Hameed. “The Effects of the Moon’s Shadow and Pre-Shadow on the Artificial Satellites Motion”. Astronomy Studies Development 1, no. 1 (May 10, 2011): e3. Accessed December 22, 2024. https://www.pagepress.org/journals/asd/article/view/asd.2011.e3.