Jorge Paredes Vieyra, Julieta Acosta Guardado and Amairani Denisse Sánchez González (2022) “A Comparative Overview of Working Length Determination with Radiographs and Two Electronic Apex Locators”, Issues and Developments in Medicine and Medical Research Vol. 7, pp. 175–182. doi: 10.9734/bpi/idmmr/v7/1616B.