Farhad, A.R., Barekatain, B. and Koushki, A.R. 2009. The Effect of Three Different Root Canal Irrigant Protocols for Removing Smear Layer on the Apical Microleakage of AH26 Sealer. Iranian Endodontic Journal. 3, 3 (Mar. 2009), 62–67. DOI:https://doi.org/10.22037/iej.v3i3.779.