Siddig, Amin M. A. “Mastoiditis and Citelli’s Abscess: A Case Report”. International Journal of Otorhinolaryngology and Head and Neck Surgery 7, no. 12 (November 25, 2021): 1919–1921. Accessed June 14, 2025. https://www.ijorl.com/index.php/ijorl/article/view/3332.