1. Pediatric Otolaryngology;Bluestone,1983
2. The pediatric airway;Cote,1993
3. Development of the upper respiratory system;Crelin;Ciba Foundation Symp,1976
4. Some anatomic considerations of the infant larynx influencing endotracheal anesthesia;Eckenhoff;Anesthesiology,1951
5. Essentials of Human Embryology;Moore,1988