Campillo-Cortes, C., 		Flores-Reyes, H., 		Dávila-Pérez, C., 		Silva-Herzog, D., 		Méndez-González, V., & 		Pozos-Guillén, A.
(2015).
 Effectiveness of three electronic apex locators to determine root canal working length..
<em>Journal Of Oral Research, 4</em>(4), 249-254.
doi:10.17126/joralres.2015.049