BIRKMANN, Jörn; FINKE, Lothar. Indicators for the evaluation and guidance of sustainable spatial development in North Rhine-Westphalia: Purposes, potentials and problems associated with the use of sustainability indicators in area development planning in North Rhine-Westphalia. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 59, n. 4, p. 276–286, 2001. DOI: 10.1007/BF03183027. Disponível em: https://rur.oekom.de/index.php/rur/article/view/1344.. Acesso em: 6 may. 2024.