- Alfaro, Eduardo Mayoral., et all. "Early Cambrian (Marianian) Trilobites and Associated Faunas from the Sierra Norte de Sevilla Geopark: A Scientific and Heritage Approach." Geoconservation Research (Geoconserv. Res.), vol. 4, no. 1, pp. 56-60, https://doi.org/10.30486/gcr.2021.1912240.1044