Delgado Montero, Víctor, and Ottón Fernández López. 2014. “Dentogingival Facial a Esthetic Parameters of the Provinces of Alajuela Y Guanacaste”. Odovtos - International Journal of Dental Sciences, no. 15 (March):39-44. https://revistas.ucr.ac.cr/index.php/Odontos/article/view/13732.