Parisa Jafari, Vahid Soltan Karimi, Kamran Amirian , Kave Tutunchian, Milad larijani, Abdolhamid Alhavaz, “Evaluation of Beverages Effect on the Surface Hardness and Roughness of Cad/Cam and Heat Cure Resin Base”, IJAST, vol. 29, no. 9s, pp. 3993 - 4002, May 2020.