N. . S. Nadhum and A. . H. Al-Khafaji, “The effect of in office bleaching on surface roughness and micro-hardness of newly developed composite materials (In vitro study)”, J Bagh Coll Dent, vol. 26, no. 2, pp. 24–29, Jun. 2014, Accessed: Dec. 01, 2024. [Online]. Available: https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/445