BREIDENBACH, Philipp; KAMBECK, Rainer; MATZ, Florian; SCHMIDT, Christoph M. Staying Alone or Reaching more Success Together? A Path for more Regional Cooperation in the Ruhrgebiet. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 71, n. 2, p. 143–156, 2013. DOI: 10.1007/s13147-013-0219-x. Disponível em: https://rur.oekom.de/index.php/rur/article/view/736.. Acesso em: 23 mar. 2025.