1. Congenital stenosis of the right mainstem bronchus, a case report;Chang;Pediatrics,1968
2. Collapsible trachea (tracheomalacia); a non-allergic cause of wheezing in infancy;Levin;Ann. Allergy,1964
3. Congenital bronchomalacia;Chandra Mohan Gupta;Am. J. Dis. Child.,1968