HÄFNER, Karl. Cluster Organizations in Praxis: Structural and institutional influences on a cluster-orientated promotion of economic development. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 74, n. 5, p. 421–436, 2016. DOI: 10.1007/s13147-016-0422-7. Disponível em: https://rur.oekom.de/index.php/rur/article/view/508. Acesso em: 15 aug. 2026.