@article{article1345ed89,
title   = {Components of surface charge in tropical soils with contrasting mineralogies},
author = {Alleoni, Luís Reynaldo Ferracciú and Peixoto, Ricardo Trippia dos Guimarães and Azevedo, Antônio Carlos and Melo, Leônidas Carrijo Azevedo},
year = {2009},
doi = {10.1097/SS.0b013e3181c17a93},
journal   = {Soil Science}
}