Rao, V. V., S. M. J., and M. Bhat. “Pattern of Hearing Loss in Tubotympanic Type of Chronic Suppurative Otitis Media”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 4, no. 5, Aug. 2018, pp. 1267-71, doi:10.18203/issn.2454-5929.ijohns20183699.