LANGHAGEN-ROHRBACH, Christian. Current regionalisation processes in the rhine-main region. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 62, n. 1, p. 58–66, 2004. DOI: 10.1007/BF03183468. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1559.. Acesso em: 6 may. 2024.