Cortijo, Iván, Sören Jensen, Manolo García, Teodoro Palacios, and José María Barrera. 2021. “The Armorican Quartzite: When Trilobites Ruled the Ordovician Seas of the Villuercas-Ibores-Jara UNESCO Global Geopark, Spain”. Geoconservation Research 4 (1). https://doi.org/10.30486/gcr.2021.1922890.1085.