M. Aminsobhani, B. Bolhari, N. Shokouhinejad, A. Ghorbanzadeh, S. Ghabraei, and M. B. Rahmani, “Mandibular First and Second Molars with Three Mesial Canals: A Case Series”, Iran Endod J, vol. 5, no. 1, pp. 36–39, Jun. 2010.