@inproceedings{inproceedingsb963bbfe,
title   = {Do socioeconomic factors explain why maternal smoking during pregnancy is higher in a more developed city of Brazil?},
author = {Ribeiro, V. S. and Rosa e Silva, Alzira Amélia Martins and Barbieri, Marco Antonio and Bettiol, Heloisa},
year = {2006},
booktitle   = {European Academy of Paediatrics}
}