Azimi, S., Delvari, P., Hajarian, H. C., Saghiri, M. A., Karamifar, K. and Lotfi, M. (2011) “Cyclic fatigue resistance and fractographic analysis of RaCe and ProTaper rotary NiTi instruments”, Iranian Endodontic Journal, 6(2), pp. 80–85. doi: 10.22037/iej.v6i2.2095.