F. Mahmood, Hazim, and Salah A. Sheet. “Comparative Experimental Measurement Study of Void Fraction Using γ – Ray and Fast Neutrons”. Rafidain Journal of Science 22, no. 6 (September 1, 2011): 102–110. Accessed September 29, 2025. https://jamh.uomosul.edu.iq/index.php/rsci/article/view/47612.