“The Effect of Solar and Lunar Attraction and SRP on the HEO of Satellite”, Iraqi Journal of Science, vol. 57, no. 1A, pp. 268–278, Feb. 2023, Accessed: Jul. 28, 2025. [Online]. Available: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/9323