HILLIGARDT, Jan. The successful initiation of voluntary regional partnerships in the implementation of sustainable spatial development. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 61, n. 1-2, p. 98–106, 2003. DOI: 10.1007/BF03183078. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1643.. Acesso em: 1 may. 2024.