Usman M. A., Olanipekun O. O., and Kareem O. M. “Biogas Generation from Domestic Solid Wastes in Mesophilic Anaerobic Digestion”. International Journal of Research in Chemistry and Environment (IJRCE) 2, no. 1 (December 31, 2011): 200–205. Accessed November 22, 2024. https://ijrce.org/index.php/ijrce/article/view/159.