P. G. Cantalupo, B. Calgua, G. Zhao, A. Hundesa, A. D. Wier, J. P. Katz, M. Grabe, R. W. Hendrix, R. Girones, D. Wang and J. M. Pipas, “Raw Sewage Harbors Diverse Viral Populations,” mBio, Vol. 2, No. 5, pp. e00180-11.
 C. T. Zainazor, M. S. Noor Hidayah, L. C. Chai, R. Tunung, F. M. Ghazali and R. Son, “The Scenario of Norovirus Contamination in Food and Food Handlers,” Journal of Microbiology and Biotechnology, Vol. 20, No. 2, 2010, pp. 229-237.
 Environment Agency, “Efficacy and Effects of Wastewater Disinfection Phase 5 Review of Wastewater UV Disinfection Performance in England and Wales,” Environment Agency R&D Technical Report P2-036/TR, 2002.
 Environment Agency, “Consenting Guidance to Achieve the requirements of the Shellfish Waters Directive (Microbial Quality),” Environment Agency Water Quality Consenting Guidance 169_01 Issued 30/01/2003.
 L. J. Cross, “The Development and Application of Quantitative Methods for Norovirus Detection in Sewage Effluents and Seawater,” Ph.D. Thesis, School of Biomedical & Molecular Sciences, University of Surrey, Guildford, 2004.
 M. Puig, J. Jofre, F. Lucena, A. Allard, G. Wadell and R. Girones, “Detection of Adenoviruses and Enteroviruses in Polluted Waters by Nested PCR Amplification,” Applied and Environmental Microbiology, Vol. 60, No. 8, 1994, pp. 2963-2970.
 J. A. Lowther, N. E. Gustar, A. L. Powell, R. E. Hartnell and D. N. Lees, “Two-Year Systematic Study to Assess Norovirus Contamination in Oysters from Commercial Harvesting Areas in the United Kingdom,” Applied and Environmental Microbiology, Vol. 78, No. 16, 2012, pp. 5812-5817. http://dx.doi.org/10.1128/AEM.01046-12
 D. Kay, J. Crowther, C. M. Stapleton, M. D. Wyer, L. Fewtrell, A. Edwards, C. A. Francis, A. T. McDonald, J. Watkins and J. Wilkinson, “Faecal Indicator Organism Concentrations in Sewage and Treated Effluents,” Water Research, Vol. 42, No. 1-2, 2008, pp. 442-454.
 C. P. Gerba, “Pathogen Removal,” In: M. Henze, M. C. M. van Loosdrecht, G. A. Ekama and D. Brdjanovic, Eds., Biological Wastewater Treatment: Principles, Modelling and Design, IWA Publishing, Cambridge University Press, London, 2008, pp. 221-242.