@article{article6b22e1f3,
title   = {30 million years of Permian volcanism recorded in the Choiyoi igneous province (W Argentina) and their source for younger ash fall deposits in the Paraná Basin: SHRIMP U–Pb zircon geochronology evidence},
author = {Rocha-Campos, A. C. and Basei, Miguel Angelo Stipp and Nutman, A P and Kleiman, Laura E. and Varela, R and Llambias, E. and Canile, F. M. and Rosa, C. R. da},
year = {2011},
doi = {10.1016/j.gr.2010.07.003},
journal   = {Gondwana research}
}