Accuracy evaluation of three electronic apex locators in teeth with immature apices - Guimarães, Bruno Martini; Vitoriano, Marcelo de Morais; Maniglia-Ferreira, Claudio; Almeida-Gomes, Fabio de; Marciano, Marina Angélica; Bramante, Clovis Monteiro; Duarte, Marco Antonio Hungaro (Revista Sul-Brasileira de Odontologia, 2014)