Mahdi, H. S., and D. S. Mohsin. “Determination of the Rotation Curve of the Milky Way Using the 21 Cm Hi Emission Line”. Iraqi Journal of Science 58, no. 2C (January 4, 2022): 1169–1176. Accessed January 3, 2026. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/6010.