D. H. O’Neill and V. R. Phillips, “A Review of the Control of Odour Nuisance from Livestock Buildings: Part 3, Properties of the Odorous Substances Which Have been Identified in Livestock Wastes or in the Air around them,” Journal Agriculture Engineering Research, Vol. 53, 1992, pp. 23-50. doi:10.1016/0021-8634(92)80072-Z
 J. J. Wu, S. Park, S. M. Hengemuehle, M. T. Yokoyama, H. L. Person, J. B. Gerrish and S. J. Masten, “The Use of Ozone to Reduce the Concentration of Malodourous Metabolites in Swine Manure Slurry,” Journal of Agricultural Engineering Research, Vol. 72, No. 4, 1999, pp. 317-327. doi:10.1006/jaer.1998.0378
 T. S. Lorig, “Cognitive and Noncognitive Effects of Odor Exposure; Electrophyiological and Behavioral Evidence,” In: S. Van Toller and G. H. Dodd (Eds.), The Psycology and Biology of Perfume, Elsevier Applied Science, London, UK, 1992, pp. 161-173.
 A. Eaton (Ed.), “Standard Methods for the Examination of Water and Wastewater,” 20th Edition, American Public Health Association (APHA), American Water Works Association (AWWA), Water Environment Federation (WEF), 2000.
 Q. Li, L. Wang, Z. Liu, and R. M. Kamens, “Could Ozonation Technology Really Work for Mitigation Air Emissions from Animal Feeding Operations?” Journal of Air and Waste Management Association, Vol. 59, 2009, pp. 1239-1246. doi:10.3155/1047-32126.96.36.1999
 D. R. Kenney and J. L. Hatfield, “The Nitrogen Cycle, Historic Perspective, and Current and Potential Future Concerns.” In: J. L. Hatfield and R. F. Follett (Eds.), Nitrogen in the Environment Sources, Problems, and Management, Academic Press, San Diego, 2008, pp. 1-18.
 P. M. Walker and C. A. Wade, “Comparison of the Effectiveness and Economic Costs of Two Production Scale Polyacrylamide Assisted Solid/Liquid Seperation Systems for the Treatment of Liquid Swine Manure,” Applied Engineering in Agriculture, Vol. 26, No. 2, 2010, pp. 299-305.