Irfan, Muhammad, Arif Jamshed, Irfan Haider, and Raza Hussain. “ORAL METHOTREXATE AS SECOND LINE CHEMOTHERAPY IN PLATINUM-REFRACTORY OR RELAPSED SQUAMOUS CELL CARCINOMA OF THE HEAD AND NECK”. Journal of Cancer & Allied Specialties 2, no. 2 (August 31, 2016). Accessed April 23, 2024. https://journals.sfu.ca/jcas/index.php/jcas/article/view/75.