Saati, Keyvan, Sheida Sheikhi, Ehsan Esnaashari, and Sara Valizadeh. 2019. “The Effects of Three Bleaching Agents on Tooth Discoloration Caused by Mineral Trioxide Aggregate”. Iranian Endodontic Journal 14 (4):253-58. https://doi.org/10.22037/iej.v14i4.23071.