MÖLLER, Joachim. Specialisation and spatial concentration in the economy of a Europe of the regions. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 58, n. 5, p. 363–372, 2000. DOI: 10.1007/BF03182926. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1167. Acesso em: 15 aug. 2026.