- Hilario, Asier., López-Horgue, Miguel Angel., Agirrezabala, Luis Miguel. (2023). Research and Geoconservation of the Albian “Giant” Ammonites Collection in the Basque Coast UNESCO Global Geopark. Geoconservation Research (Geoconserv. Res.), 4(2), 454-458, https://doi.org/10.30486/gcr.2021.1926607.1088