Khan, Muhammad Saeed. “Clinical Experience in the Use of High Dose Rate Endocavitary Radiation (Ralstron-20) in Nasopharyngeal Carcinoma”. Journal of Postgraduate Medical Institute 9, no. 1 (August 28, 2011). Accessed April 30, 2024. https://jpmi.org.pk/index.php/jpmi/article/view/484.