Guirao, Ângela Cruz, et al. “THE ISSUE OF FLOODING AND ITS RELATION TO THE SITUATION OF PERMANENT PRESERVATION AREAS: THE GOVERNMENT´S VISION AND THE USE OF GEOPROCESSING”. Revista Do Departamento De Geografia, vol. 24, Dec. 2012, pp. 151-68, https://doi.org/10.7154/RDG.2012.0024.0009.