1) Miller RD, Eriksson LI, Fleisher LA, et al. Chapter 55 : Airway Management in the Adult, Miller's Anesthesia, Eighth Ed. USA : Sanders Elsevier ; 2014. p.1647-83.e5.
2) Vissers RJ, Danzl DF. Chapter 30 : Tracheal Intubation and Mechanical ventilation, Tintinalli J, Stpczynskin J, Ma OJ, et al. Tintinalli's Emergency Medicine, Seventh Ed. USA : McGrow-Hill Professional ; 2010. p.205.
3) Roberts JR. Chapter 4 : Traechal intubation, Roberts & Hedges' Clinical Procedures in Emergency Medicine, 6th Ed. USA : Sanders Elserier ; 2014. p.98-101.
4) Technique for Nasal Intubation. Practical solutions for emergency airways. http://www.airway.com/blind-intubationtechniques.html
5) Levitan R. Nasal Intubation, EMERGENCY PHYSICIANS monthly, 2011. http://epmonthly.com/features/currentfpatules/hasal-intubation/
6) Parker Flex-Tip(TM) Tracheal Tube. http://www.parkermediccal.com/parker-flex=tip(TM)-tracheal-tube