MEDRANO ARANDA, Sara; LARDIÉS BOSQUE, Raúl. A proposal of environmental indicators for a sustainable tourism in the city of Zaragoza. Geographicalia, [S. l.], n. 66, p. 99–132, 2015. DOI: 10.26754/ojs_geoph/geoph.2014661068. Disponível em: https://papiro.unizar.es/ojs/index.php/geographicalia/article/view/1068. Acesso em: 19 feb. 2026.