@article{articlec66fcb4b,
title   = {40 Ar/39 Ar geocronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration},
author = {Vasconcelos, Paulo Marcos and Onoe, Artur Takashi and Kawashita, Koji and Soares, Adalberto José and Teixeira, Wilson},
year = {2002},
doi = {10.1590/s0001-37652002000200008},
journal   = {Anais da Academia Brasileira de Ciências}
}