@article{abrão_araújo_vieira_2009,  title={Tonometer calibration in Brasília, Brazil},  volume={72},  ISSN={0004-2749},  url={https://doi.org/10.1590/S0004-27492009000300012},  DOI={10.1590/S0004-27492009000300012},  number={3},  journal={Arquivos Brasileiros de Oftalmologia},  publisher={Conselho Brasileiro de Oftalmologia},  author={Abrão, Fernanda Pires da Silva and Araújo, Warley Alves and Vieira, Geraldo Magela},  year={2009},  month={May},  pages={346–350} }