@article{article9de48b37,
title   = {Past vegetation changes in Amazon savannas determined using carbon isotopesn of soil organic matter},
author = {Sanaiotti, T M and Martinelli, Luiz Antonio and Victoria, Reynaldo Luiz and Trumbore, S E and Camargo, Plinio Barbosa de},
year = {2002},
journal   = {Biotrópica}
}