Dadresanfar, B., Mehrvarzfar, P., Saghiri, M.A., Ghafari, S., Khalilak, Z. and Vatanpour, M. 2011. Efficacy of two rotary systems in removing gutta-percha and sealer from the root canal walls. Iranian Endodontic Journal. 6, 2 (Mar. 2011), 69–73. DOI:https://doi.org/10.22037/iej.v6i2.2094.