Saeed, Asfia, Maleeha Nayyer, Muhammad Sajid, Usman Ahmed, and Saqib Arshad Khan. “Effect of Home Bleaching on the Vickers Micro-Hardness of Resin Based Dental Materials”. Pakistan Orthodontic Journal 12, no. 2 (April 12, 2021): 90-95. Accessed September 23, 2021. https://poj.org.pk/index.php/poj/article/view/293.