Swain, Santosh Kumar, Alok Das, Satyabrata Acharya, and Jatindray Nath Mohanty. “Transnasal Endoscopic Eustachian Tube Balloon Dilation: A Review”. International Journal of Otorhinolaryngology and Head and Neck Surgery 6, no. 1 (December 23, 2019): 207–212. Accessed November 16, 2025. https://www.ijorl.com/index.php/ijorl/article/view/1820.