@article{articleb16272ce,
title   = {Reduced ultrafine particle levels in São Paulo’s atmosphere during shifts from gasoline to ethanol use},
author = {Salvo, Alberto and Brito, Joel and Geiger, Franz M. and Artaxo Netto, Paulo Eduardo},
year = {2017},
doi = {10.1038/s41467-017-00041-5},
journal   = {NATURE COMMUNICATIONS}
}