Azman, M., B. S. Gendeh, and S. A. M. Ali. “Extramedullary Plasmacytoma of the Nasopharynx: A Rare Tumour With 7-Year Follow Up”. Philippine Journal of Otolaryngology Head and Neck Surgery, vol. 26, no. 1, June 2011, pp. 27-30, doi:10.32412/pjohns.v26i1.599.