“Studying the Atomic and Molecular Hydrogen Mass (MHI, MH2) Properties of the Extragalactic Spectra”. Iraqi Journal of Science 61, no. 5 (May 28, 2020): 1233–1243. Accessed November 23, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/1606.