1. Direct application of dexamethasone for the treatment of chronic eustachian tube dysfunction;Silverstein;Ear Nose Throat J,2003
2. Massoud E , Singh H , Tewfik L . Eustachian tube function. http://emedicine.medscape.com/article/874348-overview
3. Part 1: Diving Disorders That Do Not Require Recompression. Extracts from Institute of Naval Medicine Report R98013, The Prevention and Management of Diving Accidents;Regular Review Common Medical Disorders Related To Diving—Prevention, Diagnosis and Fundamentals of Treatment;J R Army Med Corps,2003
4. A report on the first thousand cases which attended the ear, nose and throat department of a military hospital;Craig;J R Army Med Corps,1941
5. Tests of eustachian tube function: a review;Smith;Clin Otolaryngol,2015