Smith, W. K., and H. K. Subrahmanyam. “Dual Cholesteatoma in a Non-Operated Ear: A Rare Presentation”. Asian Journal of Case Reports in Medicine and Health 3, no. 2 (May 1, 2020): 8-12. Accessed October 27, 2020. https://journalajcrmh.com/index.php/AJCRMH/article/view/30124.