Kim, Myung Woo, Sun Hee Chang, and Ick Soo Choi. 2017. “Granular Cell Tumor That Originated in a Posterior Ethmoid Sinus”. International Journal of Otorhinolaryngology and Head and Neck Surgery 3 (3):721-24. https://doi.org/10.18203/issn.2454-5929.ijohns20173054.