Kazemipoor, Maryam, Shaghayegh Azad, and Farnaz Farahat. 2017. “Concurrent Effects of Bleaching Materials and the Size of Root Canal Preparation on Cervical Dentin Microhardness”. Iranian Endodontic Journal 12 (3):298-302. https://doi.org/10.22037/iej.v12i3.15774.