Bui Hong, H. “Studying the Effect of the Sludge Retention Time on the Co-Digestion of Domestic Wastewater and Organic Solid Waste Using Anaerobic Membrane Bioreactor”. Journal of Military Science and Technology, no. CBNCT, Nov. 2021, pp. 207-15, https://jmst.mod.gov.vn/index.php/jmst/article/view/2472.