Paneque-Escalona, Tahiris, et al. “Educational Intervention to Reduce the Gingival Diseases in Children of 8 and 9 Years Old Belonging to a School of the Municipality Manzanillo, Cuba”. Revista Estomatología, vol. 23, no. 1, Jan. 2015, pp. 15-20, https://doi.org/10.25100/re.v23i1.2965.