Klunklin, P., S. Isaradisaikul, P. Traisathit, and I. Chitapanarux. “A Comparative Study of Sensorineural Hearing Loss in the Treatment of Nasopharyngeal Carcinoma: Conventional Radiation Vs IMRT Technique”. Journal of Thai Association of Radiation Oncology, vol. 18, no. 1, June 2012, pp. 10-17, https://he01.tci-thaijo.org/index.php/jtaro/article/view/203459.