Zhu, Hongguang, Fulu Lu, and Fanghui Pan. “Progress and Industrialization Development Trends of the Anaerobic Digestion Technologies for Bio-Natural Gas”. International Journal of Agricultural and Biological Engineering 17, no. 4 (September 6, 2024): 1–12. Accessed February 2, 2026. https://www.ijabe.org/index.php/ijabe/article/view/9036.