Castellanos, O., C. Rios, y A. Takasu. 2004. «Chemically Sector-Zoned Garnets in the Metapelitic Rocks of the Silgará Formation in the Central Santander Massif, Colombian Andes: Occurrence and Growth History». Boletín De Geología 26 (42):9-18. https://revistas.uis.edu.co/index.php/revistaboletindegeologia/article/view/906.