@article{morgental_vier-pelisser_luisi_cogo_kopper_2011,  title={Preflaring effects on the accuracy of three electronic apex locators},  volume={26},  ISSN={1980-6523},  url={https://doi.org/10.1590/S1980-65232011000400010},  DOI={10.1590/S1980-65232011000400010},  number={4},  journal={Revista Odonto Ciência},  publisher={Pontifícia Universidade Católica do Rio Grande do Sul},  author={Morgental, Renata Dornelles and Vier-Pelisser, Fabiana Vieira and Luisi, Simone Bonato and Cogo, Deborah Meirelles and Kopper, Patrícia Maria Poli},  year={2011},  pages={331–335} }