@inproceedings{inproceedings984a8b5e,
title   = {Environmental significance of phytoliths and soil organic matter in a hyper-developed umbric epipedon of an oxisol},
author = {Calegari, Marcia Regina and Madella, M and Vidal Torrado, Pablo and Pessenda, Luiz Carlos Ruiz and Marques, F. A.},
year = {2008},
publisher = {Society of Phytolith Research},
booktitle   = {International Meeting on Phytolith Research, 7}
}