@misc{misc98347923,
title   = {Exposure to air pollution before and during pregnancy: Effect on placental structure},
author = {Soto, S. F. and Veras, M. M. and Heimann, J. C.},
year = {2013},
doi = {10.1016/j.placenta.2012.12.013},
booktitle   = {Latin-American Symposium on Maternal-Fetal Interaction and Placenta}
}