@article{article9ca4de47,
title   = {Wintertime and summertime São Paulo aerosol source apportionment study},
author = {Castanho, Andrea D A and Artaxo Netto, Paulo Eduardo},
year = {2001},
doi = {10.1016/s1352-2310(01)00357-0},
journal   = {Atmospheric Environment}
}