Borja, Ángel, Iñigo Muxika, and Juan Bald. 2006. “Protection of the Goose Barnacle Pollicipes Pollicipes, Gmelin, 1790 Population: The Gaztelugatxe Marine Reserve (Basque Country, Northern Spain)”. Scientia Marina 70 (2):235-42. https://doi.org/10.3989/scimar.2006.70n2235.