1. The Monsters of Loch Ness,1976
2. A new laryngoscope;MacIntosh;Lancet,1943
3. Videolaryngoscopy: is it only a change of view?;Merli;Minerva Anestesiol.,2010
4. Algorithms for difficult airway management: a review;Frova;Minerva Anestesiol.,2009
5. The Royal College of Anaesthetists, 4th National Audit Project (NAP4): Major Complications of Airway Management in the UK. http://www.rcoa.ac.uk/nap4.