Farhad, A. R., B. Barekatain, and A. R. Koushki. “The Effect of Three Different Root Canal Irrigant Protocols for Removing Smear Layer on the Apical Microleakage of AH26 Sealer”. Iranian Endodontic Journal, vol. 3, no. 3, Mar. 2009, pp. 62-67, doi:10.22037/iej.v3i3.779.