Yamei, Gao, et al. “Bioreactor Performance and Microbial Community Dynamics in a Production-Scale Biogas Plant in Northeastern China”. International Journal of Agricultural and Biological Engineering, vol. 10, no. 1, Jan. 2017, pp. 191-0, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/2025.