DÖRR, Heinz. Planning strategies for business traffic in conurbations: A view of the current situation in the regions of London, Paris, Munich and Vienna. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 59, n. 1, p. 49–59, 2001. DOI: 10.1007/BF03182942. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1199. Acesso em: 25 aug. 2026.