Disa, H. A., M. A. Modu, S. S. Sukai, T. O. Ligali, and O. D. Otuyemi. “Malocclusion and Orthodontic Treatment Needs of Public and Private Secondary School Students in North-Eastern Nigeria Using the Dental Aesthetic Index (DAI)”. West African Journal of Orthodontics, vol. 1, no. 2, Dec. 2012, pp. 35-39, https://wajo.oauife.edu.ng/index.php/wajo/article/view/11.