Gholami, N., S. Mehrabi, E. Zajkani, and G. Bashirinia. “Knowledge of Adults about the Symptoms and Risk Factors of Oral Cancer in Zanjan City”. Journal of Contemporary Medical Sciences, vol. 2, no. 6, June 2016, pp. 45-48, https://www.jocms.org/index.php/jcms/article/view/71.