Chumpitaz-Durand, R. B. and Córdova-Sotomayor, D. Ángel (2018) “Prevalence and risk factors for extrinsic discoloration in deciduous dentition of Peruvian schoolchildren”, Revista Facultad de Odontología Universidad de Antioquia, 29(2), pp. 257–272. doi: 10.17533/udea.rfo.v29n2a1.