de Morais, A.L.G. et al. 2016. Working Length Determination Using Cone-Beam Computed Tomography, Periapical Radiography and Electronic Apex Locator in Teeth with Apical Periodontitis: A Clinical Study. Iranian Endodontic Journal. 11, 3 (Jun. 2016), 164–168. DOI:https://doi.org/10.22037/iej.v11i3.5239.