García-Gonzales, Luis Angel, and Teresa Angélica Evaristo-Chiyong. 2020. “Esthetic Perception of the Smile According to Variation of the Vertical Position and the Angulation of the Upper Central Incisor in Three Regions of Peru”. Odovtos - International Journal of Dental Sciences 22 (2):179-91. https://doi.org/10.15517/ijds.2020.41149.