Kleigman RM, Stanton B, St. Geme J, et al. 2011. Acute inflammatory upper airway obstruction. Nelson Textbook of Pediatrics, 19th Ed; Ch 377, 1445-1450.
Fleisher and Ludwig, Textbook of Pediatric Emergency Medicine, 6th Edition, 2010 pages 584-88.
Quintero DR, Fakhoury K, et al. Assessment of stridor in children. UpToDate. https://www.uptodate.com/contents/assessment-of-stridor-in-children. Updated October 11, 2016. Accessed December 2016.
Fleisher GR, Ludwig S, Ed. Textbook of Pediatric Emergency Medicine, 2010. 6th ed., pp. 584-8. LLW.