H. Sawali, M. R. M. Yunus, O. C. Ai, and P. P. S. H. Athar, “Cutaneous Metastases from Nasopharyngeal Carcinoma: A Rare Manifestation”, Philipp J Otolaryngol Head Neck Surg, vol. 25, no. 2, pp. 32–35, Dec. 2010.