K. Shamoon, Sabeeh. “Geometrical Effects on the XRF Spectrometer Data Validity Using Hypothetical 20 KeV Photon Source”. Rafidain Journal of Science 22, no. 3 (April 1, 2011): 50–57. Accessed September 28, 2025. https://jamh.uomosul.edu.iq/index.php/rsci/article/view/47409.