Xiong, Mengfei, and Wai Lun Moy. “Orbital Apex Syndrome Resulting from Mixed Bacterial Sphenoid Sinusitis”. European Journal of Case Reports in Internal Medicine 5, no. 7 (May 22, 2018). Accessed April 29, 2024. https://www.ejcrim.com/index.php/EJCRIM/article/view/905.