@article{ribeiro_figueiredo_silva_batista_barbieri_lamy filho_alves_santos_bettiol_2007,  title={Do socioeconomic factors explain why maternal smoking during pregnancy is more frequent in a more developed city of Brazil?},  volume={40},  ISSN={0100-879X},  url={https://doi.org/10.1590/S0100-879X2006005000146},  DOI={10.1590/S0100-879X2006005000146},  number={9},  journal={Brazilian Journal of Medical and Biological Research},  publisher={Associação Brasileira de Divulgação Científica},  author={Ribeiro, V.S. and Figueiredo, F.P. and Silva, A.A.M. and Batista, R.L.F. and Barbieri, M.A. and Lamy Filho, F. and Alves, M.T.S.S.B. and Santos, A.M. and Bettiol, H.},  year={2007},  month={Sep},  pages={1203–1210} }