Abba, U. T., A. B. Muhammad, M. B. Maina, M. Shuwa, S. S. Dumbulwa, and I. Yahaya. “Optimization Strategies, Synergistic Effects, and Emerging Technologies for Enhanced Biogas Production Through Anaerobic Co-Digestion: A Review”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 22, no. 3, Sept. 2026, pp. 863-77, https://azojete.com.ng/index.php/azojete/article/view/1392.