Engert, Tobias, Leyla Acu, Johann Schoenhofer, Nikki Rommers, and Nader Ahmad. “Post-Therapeutic Detection of Local Tumor Persistence of Head and Neck Cancer: The Value of Routine Control Endoscopy With Biopsy and Medical Imaging”. International Journal of Otorhinolaryngology and Head and Neck Surgery 10, no. 3 (April 12, 2024): 265–273. Accessed November 16, 2025. https://www.ijorl.com/index.php/ijorl/article/view/4252.