Y. Sleeman, Sleeman, Khalid A. Jassim, and Hayfa A. AL-Sawaf. “The Effective Atomic Number of Tissue Equivalent Materials”. Rafidain Journal of Science 16, no. 4 (March 1, 2005): 22–27. Accessed September 29, 2025. https://jwups.uomosul.edu.iq/index.php/rsci/article/view/46712.