Khedmat, S. et al. 2016. Efficacy of ProTaper and Mtwo Retreatment Files in Removal of Gutta-percha and GuttaFlow from Root Canals. Iranian Endodontic Journal. 11, 3 (Jun. 2016), 184–187. DOI:https://doi.org/10.22037/iej.v11i3.10918.