1. Kumar, Abbas and Fausto, (2004) Robbins and Cotran’s pathological basis of disease, 7th (ed): 787–788
2. Rosai J (1996) Rosai and Ackerman’s surgical pathology, 8th edn. Mosby-Year Book, St. Louis, pp 2509–2516
3. Loury M (2002) Healthopedia.com, medical encyclopedia, disease and conditions, Aural Polyps. http://www.healthopedia.com/aural-polyps/
4. Hoffman, D (2009) Ear, your total health
5. Piepergerdes JC, Kramer BM, Behnke EE (1980) Keratosis obturans and external auditory canal cholesteatoma. Laryngoscope 90:383–391