Kamlenga, M., D. Olukanni, and T. Mkandawire. “Prospect of Recovering Bio-Fertilizer by Anaerobic Co- Digesting Cow Manure, Palm Oil Sludge, and Cassava Peels”. COVENANT JOURNAL OF ENGINEERING TECHNOLOGY, vol. 8, no. 1, May 2024, https://journals.covenantuniversity.edu.ng/index.php/cjet/article/view/4173.