Bello, M. D. C., C. Tibúrcio-Machado, C. D. Londero, F. B. Barletta, and C. H. C. Moreira. “Diagnostic Efficacy of Four Methods for Locating the Second Canal of the Mesiobuccal Root of Maxillary Molars”. Iranian Endodontic Journal, vol. 13, no. 2, Apr. 2018, pp. 204-8, doi:10.22037/iej.v13i2.16564.