Harun, Md. Abu Saeed Ibn, et al. “Severely Curved Mandibular Molar Teeth Managed by Nickel Titanium K-Flex Files and Balanced Force Technique”. Bangladesh Journal of Dental Research & Education, vol. 1, no. 1, July 2013, pp. 12-14, doi:10.3329/bjdre.v1i1.15795.