@article{article32c67ae5, title = {The variability of urban aerosol size distributions and optical properties in São Paulo – Brazil: new particle formation events occur at the site}, author = {Backman, J and Morais, F and Artaxo Netto, Paulo Eduardo}, year = {2011}, doi = {10.5194/acpd-11-30419-2011}, journal = {Atmospheric Chemistry and Physics Discussions} }