@article{article90314c9f,
title   = {In-canopy gradients, composition, sources, and optical properties of aerosol over the Amazon forest},
author = {Guyon, P and Graham, B and Roberts, G C and Mayol Bracero, O L and Maenhaut, W and Artaxo Netto, Paulo Eduardo and Andreae, M O},
year = {2003},
doi = {10.1029/2003jd003465},
journal   = {Journal of Gephysical Research-Atmospheres}
}