Ogunwande, G., O. Adams, and T. Kolawole. “Effect of Substrate Volume in a Digester on Biogas Production from Animal Excreta”. Moor Journal of Agricultural Research 18, no. 1 (November 23, 2023). Accessed May 11, 2026. https://iart.gov.ng/moorjournal/index.php/mjar/article/view/69.