Martínez, J.A. Fernández, E. Maseda Álvarez, A. Martínez Ferreras, and A. Lede Barreiro. “Silent Sinus Syndrome: An Unsuspected Cause of Palpebral Retraction”. Portuguese Journal of Otorhinolaryngology and Head and Neck Surgery 51, no. 3 (September 15, 2013): 201–204. Accessed November 10, 2026. https://www.journalsporl.com/index.php/sporl/article/view/2650.