1. Anatomy of the airway. In Principles of Airway Management;Finucane,1996
2. Gray's Anatomy. The Anatomical Basis of Clinical Practice,2004
3. Case Western Reserve University School of Medicine, Cleveland, Ohio: http://metrohealthanesthesia.com/edu/airway/anatomy1.htm
4. University of Virginia Health System: http://www.healthsystem.virginia.edu/Internet/Anesthesiology-Elective/airway/anatomy.cfm
5. Institute of Rehabilitation Research and Development, Ottawa, Ontario, Canada: http://www.irrd.ca/education/presentation.asp?refname22