Busquim, Sandra Soares Kühne, et al. “Evaluation of Canal Transportation and Centering Ability of Two Nickel-Titanium Rotary Instruments”. Clinical and Laboratorial Research in Dentistry, vol. 20, no. 1, Feb. 2014, pp. 10-5, https://doi.org/10.11606/issn.2357-8041.v20i1p10-5.