@ARTICLE {KOUTIKA:1999, title = {Characterisation of soil organic matter in the topsoils under rain forest and pastures in the eastern Brazilian Amazon Basin}, author = {Koutika, L. and Andreux, F. and Hassink, J. and Chone, Th. and Cerri, C. C. *}, journal = {Biology and Fertility of Soils}, year = {1999}, volume = {29}, number = {3}, pages = {309--313}, issn = {0178-2762}, }