D. Kharrufa, Hala, and حلا. “Determination of the Concentration of 40K of Mudstone in Northern Iraq by Using Gamma Ray Spectroscopy and Flame Photometry Technique”. Rafidain Journal of Science 24, no. 5 (June 24, 2025): 97–107. Accessed August 7, 2025. https://rjps.uomosul.edu.iq/index.php/rsci/article/view/12556.