PURKARTHOFER, E. When soft planning and hard planning meet: Conceptualising the encounter of European, national and sub-national planning. European Journal of Spatial Development, [S. l.], v. 14, n. 2, p. 20, 2016. Disponível em: http://oimplantology.org/index.php/EJSD/article/view/217. Acesso em: 23 apr. 2025.