Frough Reyhani, M., Rahimi, S. and Shahi, S. 2008. Root Canal Therapy of a Mandibular First Molar with Five Root Canals: A Case Report. Iranian Endodontic Journal. 2, 3 (Oct. 2008), 110–112. DOI:https://doi.org/10.22037/iej.v2i3.321.