@article{ribeiro_2004,  title={Retardo mental},  volume={80},  ISSN={0021-7557},  url={https://doi.org/10.1590/S0021-75572004000600016},  DOI={10.1590/S0021-75572004000600016},  number={5},  journal={Jornal de Pediatria},  publisher={Sociedade Brasileira de Pediatria},  author={Ribeiro, Erlane Marques},  year={2004},  pages={429–430} }