K. . S. Yazdi, M. Choudhury, F. Chowdhury, S. A. Ahmed, and M. S. Islam, “Association of Betel Leaf Chewing and Use of Tobacco with Development of Oral Cancer”, J. Dhaka Natl. Med. Coll. Hosp., vol. 21, no. 1, pp. 42–47, Mar. 2015.