GUTIERREZ-MARCO, Juan Carlos; LOYDELL, David K.; STORCH, Petr. The Silurian Section of the Valle syncline (Sierra Norte de Sevilla UNESCO Global Geopark, Spain) as an International Standard for Graptolite Biostratigraphy. Geoconservation Research, [S. l.], v. 4, n. 1, 2021. DOI: 10.30486/gcr.2020.1908691.1032. Disponível em: https://oiccpress.com/gcr/article/view/2760. Acesso em: 12 may. 2026.