1. Emergency Surgery, Standards for Unscheduled Surgical Care, Guidance for Providers, Commissioners and Service Planners,2011
2. The Higher Risk Surgical Patient: Towards Improved Care for a Forgotten Group;The Royal College of Surgeons of England, Department of Health,2010
3. Knowing the Risk; a Review of the Peri-operative Care of Surgical Patients,2011
4. Pre-operative risk scores for the prediction of outcome in elderly people who require emergency surgery;Rix;World J. Emerg. Surg.,2007
5. Decisions to operative: the ASA grade 5 dilemma;Horwood;Ann. R. Coll. Surg. Engl.,2011