1. Audit Commission. http://www.audit-commission.gov.uk/SiteCollectionDocuments/AuditCommissionReports/NationalStudies/20090827pbrdataassuranceframework0809rep.pdf
2. Assessing the Quality of Hospitals;Black;British Medical Journal,2010
3. Intelligent Information;Bottle;Health Services Research,2008
4. Hospital Standardised Mortality Ratios;Bottle;British Medical Journal,2011
5. Deprivation;Carstairs;British Medical Journal,1989