@article{article4221c055,
title   = {Natural abundance of 13C in tropical grasses from the INPA, Instituto Nacional de Pesquisas da Amazônia, herbarium},
author = {Medina, Ernesto and Martinelli, Luiz Antonio and Barbosa, Edelcilio M and Victoria, Reynaldo Luiz},
year = {1999},
doi = {10.1590/s0100-84041999000100007},
journal   = {Brazilian Journal of Botany}
}