Majeed, Dr. Reem Hassan. “A Comparative Study Evaluates the Effect of Hydrogen Peroxide 38% and Carbamide Peroxide 35% Bleaching Products on Enamel Microhardness (In Vitro Study)”. Mustansiria Dental Journal 9, no. 2 (March 4, 2018): 164–171. Accessed May 6, 2024. https://mdj.uomustansiriyah.edu.iq/index.php/mdj/article/view/260.