Litvak, V. D., S. Poma, and C. O. Limarino. “Pyroclastic Volcanism of Middle Miocene Age in the Valle Del Cura: New Geological and Radiometric Data”. Revista De La Asociación Geológica Argentina, vol. 59, no. 3, Sept. 2004, pp. 514-7, https://revista.geologica.org.ar/raga/article/view/1460.