Gelera, January E., and Norberto V. Martinez. “Undifferentiated Nasopharyngeal Malignancy With Immunohistochemical Features of Diffuse Large B Cell Lymphoma and Undifferentiated Carcinoma: A Collision Tumor?”. Philippine Journal of Otolaryngology Head and Neck Surgery 27, no. 1 (June 29, 2012): 12–17. Accessed April 28, 2024. https://pjohns.pso-hns.org/index.php/pjohns/article/view/545.