1. NHS Institute for Innovation and Improvement Better Care, Better Value Indicators http://www.productivity.nhs.uk
2. Department of Health NHS Modernisation Agency 10 High Impact Changes for Service Improvement and Delivery, 2004 http://www.ogc.gov.uk/documents/Health_High_Impact_Changes.pdf
3. Department of Health Day surgery: Operational Guide. Waiting, Booking and Choice, 2002 http://www.dh.gov.uk/dr_consum_dh/groups/dh_digitalassets/@dh/@en/documents/digitalasset/dh_4060341.pdf