Oparaku, N. F., Ofomatah, A. C, and Okoroigwe, E. C. 2013. “Biodigestion of Cassava Peels Blended With Pig Dung for Methane Generation”. African Journal of Pig Farming 1 (1):23 - 27. https://elixirpublishers.in/index.php/ajpf/article/view/615.