1. Tracheomalacia;Baxter;Ann. Otol. Rhinol. Laryngol.,1963
2. Trachealatenose durch Knorpelmissbildung;Beikert;HNO.,1959
3. Difinition and cause of the tracheobronchial collapse syndrome;Campbell;Br. J. Dis. Chest.,1967
4. Terminology for excessive dynamic compremion of the airways, tracheobronchial collapse, and related conditions;Campbell;Am. Rev. Respir. Die.,1968
5. Congential stenosis of the trachea;Cantrell;Am. J. Surg.,1964