De Menezes, Marcio, et al. “Simulation of the Effect of Dental Modifications on Facial Soft Tissues: A 3D Stereophotogrammetric Study”. Italian Journal of Anatomy and Embryology, vol. 115, no. 1/2, Nov. 2010, p. 47, https://oajournals.fupress.net/index.php/ijae/article/view/4432.