Rodríguez García, Gabriel. «Petrographic, Chemical and Geochronological Characteristics of the Onzaga Metarhyolite and Its Correlation With Ordovician Magmatic Events in the Northern Andes, Colombia». Boletín Geológico 49, no. 1 (enero 1, 2022): 7–27. Accedido agosto 17, 2025. https://granate.sgc.gov.co/index.php/boletingeo/article/view/571.