Motta, L. J., J. G. dos Santos, T. A. Alfaya, C. C. Guedes, C. H. L. de Godoy, and S. K. Bussadori. “Clinical Status of Permanent First Molars in Children Aged Seven to Ten Years in a Brazilian Rural Community”. Brazilian Journal of Oral Sciences, vol. 11, no. 4, Oct. 2015, pp. 475-80, doi:10.20396/bjos.v11i4.8641246.