Galagali, J. R., Roohie Singh, and Santosh Kumar. “Isolated Sphenoid Polyp: A Cause of Headache”. International Journal of Otorhinolaryngology and Head and Neck Surgery 5, no. 1 (December 25, 2018): 228–230. Accessed April 23, 2025. https://www.ijorl.com/index.php/ijorl/article/view/1221.