GROWE, Anna; H. BLOTEVOGEL, Hans. Knowledge Hubs in the German Urban System: Identifying Hubs by Combining Network and Territorial Perspectives. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 69, n. 3, p. 175–185, 2011. DOI: 10.1007/s13147-011-0087-1. Disponível em: https://rur.oekom.de/index.php/rur/article/view/786.. Acesso em: 6 may. 2024.