Risse, A., Trumbull, R., Coira, B., Kay, S. M., van den Bogaard, P. (2008): Ar-40/Ar-39 geochronology of mafic volcanism in the back-arc region of the southern Puna plateau, Argentina. - Journal of South American Earth Sciences, 26, 1, 1-15.https://doi.org/10.1016/j.jsames.2008.03.002