Jeison, David, Israel Díaz, and Jules B. van Lier. 2008. “Anaerobic Membrane Bioreactors: Are Membranes Really Necessary?”. Electronic Journal of Biotechnology 11 (4). Valparaíso, Chile:0-0. https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v11n4-9.