GEHRLEIN, Ulrich. Indicators of sustainable development on the local and regional level: Experiences and requirements for further development: Results of a national survey. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 60, n. 3-4, p. 239–247, 2002. DOI: 10.1007/BF03183057. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1602.. Acesso em: 5 may. 2024.