Y. Shehab, Ahmed. “Determination of Bio-Decay Coefficient of Disposed Activated Sludge from Wastewater Treatment Plant in Medical Assembly of Mosul City”. Al-Rafidain Engineering Journal (AREJ) 19, no. 2 (April 28, 2011): 28–37. Accessed September 7, 2025. https://jamh.uomosul.edu.iq/index.php/arej/article/view/31271.