Petrinovic, Ivan Alejandro; Riller, Ulrich; Brod, José Affonso (February 2005). "The Negra Muerta Volcanic Complex, southern Central Andes: geochemical characteristics and magmatic evolution of an episodically active volcanic centre". Journal of Volcanology and Geothermal Research. 140 (4): 295–320. Bibcode:2005JVGR..140..295P. doi:10.1016/j.jvolgeores.2004.09.002.
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Petrinovic, Ivan Alejandro; Riller, Ulrich; Brod, José Affonso (February 2005). "The Negra Muerta Volcanic Complex, southern Central Andes: geochemical characteristics and magmatic evolution of an episodically active volcanic centre". Journal of Volcanology and Geothermal Research. 140 (4): 295–320. Bibcode:2005JVGR..140..295P. doi:10.1016/j.jvolgeores.2004.09.002.