Jefferson, B., A. L. Laine, T. Stephenson and S. L. Judd, “Advanced Biological Unit Process for Domestic Water Recycling.”, Water. Science and Technology, 43, 211(2001)
Bai, R., Leow, H.F., “Microfiltration of activated sludge wastewater-The effect of system operation parameters”, Separation and Purification Technology 29 (2), 189-198(2002)
Barker, D.J., Stuckey, D.C., “Modeling of soluble microbial products in anaerobic digestion: The effect of feed strength and composition”, Water Environment Research 73 (2), 173-184(2001)