Gamal, W., A. Safwat, and A. Abdou. “Effect of Coloring Beverages on Color Stability of Single Shade Restorative Material: An In Vitro Study”. Open Access Macedonian Journal of Medical Sciences, vol. 10, no. D, Jan. 2022, pp. 28-32, doi:10.3889/oamjms.2022.7679.