GREIVING, Habil Stefan. The spatial planning contract as an instrument to secure co-operations in the central place system. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 61, n. 5, p. 371–378, 2003. DOI: 10.1007/BF03183880. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1580.. Acesso em: 3 may. 2024.