Lahoud Salem, Victor, Janet Mendoza Zapata, Carlos Uriarte Mora, and Arnaldo Munive Degregori. 2008. “Evaluation of the Clinical Effects of Dental Whitening Using Two Different Techniques”. Odontología Sanmarquina 11 (2): 74-77. https://doi.org/10.15381/os.v11i2.3032.