K. Zeki, Mohammed, محمد, Aziz J. Abdul-Kahader, نزيهة, and Nazeeha A. Daoud. “Density Law of Spiral Galaxy Relative to Rotation Curves”. Rafidain Journal of Science 20, no. 6 (June 24, 2025): 90–96. Accessed August 9, 2025. https://ojs.uomosul.edu.iq/index.php/rsci/article/view/11661.