TITZE, Mirko; BRACHERT, Matthias; KUBIS, Alexander. The identification of Germany’s horizontal and vertical industrial clusters: A new approach and first empirical results. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 67, n. 5-6, p. 353–368, 2009. DOI: 10.1007/BF03185711. Disponível em: https://rur.oekom.de/index.php/rur/article/view/990. Acesso em: 15 aug. 2026.