@article{almeida_2015,  title={MATEMÁTICA CONCRETA},  volume={5},  ISSN={2238-3875},  url={https://doi.org/10.1590/2238-38752015v534},  DOI={10.1590/2238-38752015v534},  number={3},  journal={Sociologia & Antropologia},  publisher={Universidade Federal do Rio de Janeiro},  author={Almeida, Mauro W. B.},  year={2015},  month={Sep},  pages={725–744} }