@inproceedings{inproceedingsab421955,
title   = {Application of the 40 Ar/ 39 Ar methodology in the study of tectonic reactivations of shear zones: romeral fault system in the central Cordillera of Colombia},
author = {Vinasco Vallejo, César Javier and Cordani, Umberto G. and Vasconcelos, Paulo Marcos},
year = {2003},
publisher = {CBPM/IRD},
booktitle   = {South American Symposium on Isotope Geology}
}