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environment-agency.gov.uk
Environment Agency (archive) – Persistent, bioaccumulative and toxic PBT substances at the Wayback Machine (archived August 4, 2006). environment-agency.gov.uk. Retrieved on 2012-12-19^[2]Arquivado 04 de agosto de 2006 en Wayback Machine.
Water and Environmental Health at London and Loughborough (1999). "Waste water Treatment Options."Arquivado 17 de xullo de 2011 en Wayback Machine. Technical brief no. 64. London School of Hygiene & Tropical Medicine and Loughborough University.
Endocrine Disruption Found in Fish Exposed to Municipal Wastewater at the Wayback Machine (archived October 15, 2011). USGS [3]Arquivado 15 de outubro de 2011 en Wayback Machine.
web.archive.org
Water and Environmental Health at London and Loughborough (1999). "Waste water Treatment Options."Arquivado 17 de xullo de 2011 en Wayback Machine. Technical brief no. 64. London School of Hygiene & Tropical Medicine and Loughborough University.
Environment Agency (archive) – Persistent, bioaccumulative and toxic PBT substances at the Wayback Machine (archived August 4, 2006). environment-agency.gov.uk. Retrieved on 2012-12-19^[2]Arquivado 04 de agosto de 2006 en Wayback Machine.
Endocrine Disruption Found in Fish Exposed to Municipal Wastewater at the Wayback Machine (archived October 15, 2011). USGS [3]Arquivado 15 de outubro de 2011 en Wayback Machine.
