1. Brimacombe JR, Brain AIJ, Berry AM. Preparation for use.In: The Laryngeal Mask Airway. A Review and Practical Guide. London: W.B. Saunders Company, 1997: 52–65.
2. Brain AIJ. The Laryngeal Mask Airway, Instruction manual. Henley, UK: Intavent Research Ltd, 1995: 41–2.