@article{2003,  ISSN={0100-1574},  url={https://doi.org/10.1590/S0100-15742003000300012},  DOI={10.1590/S0100-15742003000300012},  number={120},  journal={Cadernos de Pesquisa},  publisher={Fundação Carlos Chagas},  year={2003},  month={Nov},  pages={239–247} }