Al-Hajjar, Ruaa Lateef Noor, Ekhlass M. Taha, Ahlam M. Farhan, and Naser Shaalan. “Enzymatic Assay of Immobilized β-D-Galactosidase Enzyme on Magnetite Nanoparticle”. Iraqi Journal of Science 64, no. 12 (December 30, 2023): 6093–6103. Accessed January 8, 2026. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/8001.