Dávila Cabanillas, N. (2012). Natural characteristics as an initicial factor for a proper territorial planning in the functional area of Donostialdea-Bajo Bidasoa (Basque Country). Boletín De La Asociación De Geógrafos Españoles, (60). Recuperado a partir de https://bage.age-geografia.es/ojs/index.php/bage/article/view/1523