Herkal, K., K. Ramasamy, S. K. Saxena, S. Ganesan, and A. Alexander. “Hearing Loss in Tympanic Membrane Perforations: An Analytic Study”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 4, no. 5, Aug. 2018, pp. 1233-9, doi:10.18203/issn.2454-5929.ijohns20183693.