Rojas-Fernández, José Alberto, Alirio Balza-Quintero, Vicente Marcano, Paula Andrea Rojas, Delsy Dávila-Vera, Zulma Peña-Contreras, Rosa Virginia Mendoza-Briceño, and Ernesto Palacios-Prü. “Secondary Metabolites of Lichens in the Snow Zone of the Sierra Nevada in Mérida-Venezuela and Their Role in the Absorption of Ultraviolet Radiation”. Anales del Jardín Botánico de Madrid 65, no. 1 (June 30, 2008): 59–72. Accessed April 25, 2024. https://rjb.revistas.csic.es/index.php/rjb/article/view/246.