Gopalakrishnan, Gopika, and Shibu George. “Role of Preoperative Tympanometric Evaluation of Eustachian Tube in Patients Undergoing Type-1 Tympanoplasty for Chronic Otitis Media”. International Journal of Otorhinolaryngology and Head and Neck Surgery 8, no. 5 (April 22, 2022): 479–483. Accessed November 16, 2025. https://www.ijorl.com/index.php/ijorl/article/view/3511.