Araújo, D. B., M. J. P. Lima, and R. P. C. de Araújo. “Action of Bleaching Agents Containing Hydrogen Peroxide and Carbamide Peroxide on Human Dental Enamel”. Journal of Medical and Biological Sciences, vol. 6, no. 1, Jan. 2007, pp. 100-21, doi:10.9771/cmbio.v6i1.4171.