@article{ferreira_luersen_borges_2012,  title={Nickel-titanium alloys: a systematic review},  volume={17},  ISSN={2176-9451},  url={https://doi.org/10.1590/S2176-94512012000300016},  DOI={10.1590/S2176-94512012000300016},  number={3},  journal={Dental Press Journal of Orthodontics},  publisher={Dental Press International},  author={Ferreira, Marcelo do Amaral and Luersen, Marco Antônio and Borges, Paulo César},  year={2012},  month={May},  pages={71–82} }