John, J., D. S., and R. P. S. “Prevalence of Malocclusion and Treatment Needs of 12 Year Old School Children, Chennai Using the Dental Aesthetic Index (DAI)”. Journal of Pierre Fauchard Academy (India Section), vol. 25, no. 1, Dec. 2018, pp. 14-21, https://informaticsjournals.co.in/index.php/jpfa/article/view/22971.