R. Sumithrarachchi, S., W. Pemasiri, A. D. Pathiranage, and P. R. Jayasooriya. “Betel Quid, Smoking and Alcohol Dependency Among Patients With Oral Potentially Malignant Disorders and Oral Cancer in Sri Lanka; A Preliminary Case-Control Study”. Asian Pacific Journal of Cancer Biology, Vol. 6, no. 3, Sept. 2021, pp. 207-12, doi:10.31557/apjcb.2021.6.3.207-212.