Vettore, Mario Vianna, et al. “Social Inequalities and Periodontal Disease: Multilevel Approach in SBBrasil 2010 Survey”. Revista De Saúde Pública, vol. 47, no. supl. 3, Dec. 2013, pp. 29-39, https://doi.org/10.1590/rsp.v47isuppl.3.76751.