M. Domínguez Pacheco, L. Bravo Angamarca, and E. Villavicencio-Caparó, “Prevalence of selected periodontal disease in schools 12 years old”, Odo. Vit., vol. 2, no. 33, pp. 43–48, Dec. 2020, doi: 10.59334/ROV.v2i33.400.