Ibraheem, A.K. and Salah, A.H. (2018) “Calculation the Venus orbital properties and the variation of its position”, Iraqi Journal of Science, 59(4B), pp. 2150–2158. Available at: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/549 (Accessed: 10 December 2025).