Batista Lopes, C., Pereira, M. E., Vale, C., Lillebo, A. I., Pardal, M. Ângelo and Costa Duarte, A. (2007) “Assessment of spatial environmental quality status in Ria de Aveiro (Portugal)”, Scientia Marina, 71(2), pp. 293–304. doi: 10.3989/scimar.2007.71n2293.