P. Ahmad, M. I. Karobari, R. Mahmood, T. Liszen, and J. A. Asif, “ETIOLOGY AND REGIONAL VARIATION OF ORAL CANCER- A REVIEW”, Psychosocial rehabilitation, vol. 24, no. 6, pp. 7465–7474, Aug. 2020, doi: 10.61841/1195gg21.