1. Global Health and Aging 2014 http://www.who.int/ageing/publications/global_health/en/
2. Age (UK) 2014 http://www.ageuk.org.uk
3. World Population Prospects: The 2010 Revision http://esa.un.org/unpd/wpp
4. The life course, care pathways and elements of vulnerability. A picture of health needs in a vulnerable population;Pretty;Gerodontology,2014
5. Adult Dental Health Survey 2014 http://www.ic.nhs.uk/statistics-and-data-collections/primary-care/dentistry/adult-dental-health-survey-2009-summary-report-and-thematic-series