Thomas, A. M., A. G. Menon, P. Pradeep, and A. R. Vinayakumar. “A Comparative Study on the Nasal Endoscopic Findings in Patients With Chronic Otitis Media”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 4, no. 1, Dec. 2017, pp. 222-7, doi:10.18203/issn.2454-5929.ijohns20175629.