Y. Al-Saffawi, Abdul-Aziz, and Reem A. Talaat. “Sewage Water Purification Through Direct Exposure to Solar Radiation”. Rafidain Journal of Science 27, no. 1 (March 1, 2018): 64–75. Accessed September 9, 2025. https://ojs.uomosul.edu.iq/index.php/rsci/article/view/46484.