@inproceedings{inproceedings59028b4e,
title   = {Age of the eastern Paraguay alkaline magmatism},
author = {Gomes, Celso B. and Velázquez Fernandez, Victor and Comin-Chiaramonti, P.},
year = {2006},
publisher = {Idea Gráfica},
booktitle   = {South American Symposium on Isotope Geology}
}