G., P., S. Murali, and F. James. “Clinical and Audiological Study of Chronic Suppurative Otitis Media Tubotympanic Type”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 3, no. 3, June 2017, pp. 671-5, doi:10.18203/issn.2454-5929.ijohns20173045.