1. Five Equations that Changed the World: the Power and Poetry of Mathematics;Guillen,1995
2. Cricoid pressure to control regurgitation of stomach contents during induction of anaesthesia;Sellick;Lancet,1961
3. Cricoid pressure: the argument against;Turnbull;Trends Anaesth. Crit. Care,2015
4. Cricoid pressure: the case in favour;Athanassoglou;Trends Anaesth. Crit. Care,2015
5. Major Complications of Airway Management in the UK. Report and Findings of the Fourth National Audit Project of the Royal College of Anaesthetists and the Difficult Airway Society;Fourth National Audit Project,2011