Besrour, A., N. Daouahi, D. Hadyaoui, A. Amor, and M. Cherif. “Aesthetic Considerations When Restoring Single Maxillary Central Incisor”. Asian Journal of Dental Sciences, Vol. 1, no. 1, Dec. 2018, pp. 1-6, https://journalajds.com/index.php/AJDS/article/view/25255.