1. Obstetric Anaesthetists’ Association National Obstetric Anaesthesia Data for 2012 2014 http://www.oaa-anaes.ac.uk/assets/_managed/cms/files/NOAD%20REPORTS/National%20Obstetric%20Anaesthesia%20Data%20for%202012%20final.pdfr(accessed03/10/2017)
2. Litigation related to regional anaesthesia: an analysis of claims against the NHS in England 1995-2007;Szypula;Anaesthesia,2010
3. National Health Service Litigation Authority Ten years of maternity claims 2012 www.nhsla.com/Safety/Documents/Ten%20Years%20of%20Maternity%20Claims%20
4. Bolam v Friern Hospital Management Committee 1957
5. Bolitho v City Hackney Health Authority 1998