@article{buzzoni_elias_fernandes_miguel_2012,  title={Assessment of surface friction of self-ligating brackets under conditions of angulated traction},  volume={17},  ISSN={2176-9451},  url={https://doi.org/10.1590/S2176-94512012000400013},  DOI={10.1590/S2176-94512012000400013},  number={4},  journal={Dental Press Journal of Orthodontics},  publisher={Dental Press International},  author={Buzzoni, Roberta and Elias, Carlos N. and Fernandes, Daniel J. and Miguel, José Augusto M.},  year={2012},  month={Jul},  pages={51–56} }