@article{ramos_cuman_2009,  title={Fatores de risco para prematuridade: pesquisa documental},  volume={13},  ISSN={1414-8145},  url={https://doi.org/10.1590/S1414-81452009000200009},  DOI={10.1590/S1414-81452009000200009},  number={2},  journal={Escola Anna Nery},  publisher={Universidade Federal do Rio de Janeiro},  author={Ramos, Helena Ângela de Camargo and Cuman, Roberto Kenji Nakamura},  year={2009},  month={Apr},  pages={297–304} }