“Stabilization of Sludge in Zakho Municipal Wastewater by Anaerobic Digestion for Biogas Production in Kurdistan Region, Iraq”. Science Journal of University of Zakho 10, no. 3 (July 1, 2022): 86–92. Accessed November 3, 2025. https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/924.