Mahmood, Ammar Seddiq, and Fatmah Ahmed Basher. “Replacing the Content in E-Abacus Diagram II”. Iraqi Journal of Science, no. 7 (July 31, 2021): 2369–2375. Accessed June 21, 2026. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/3076.