Adama, K.K and Ikhazuangbe, P.M.O. “Modeling and Optimization of Anaerobic Biogas Digestion Process of Pig Dung Using Response Surface Methodology”. NIPES - Journal of Science and Technology Research 4, no. 1 (March 5, 2022). Accessed November 22, 2024. https://journals.nipes.org/index.php/njstr/article/view/312.