HÜPPAUFF, Jakob. Safeguarding agricultural land in spatial planning – Results of a nationwide plan content analysis. Raumforschung und Raumordnung | Spatial Research and Planning, DE, v. 84, n. 2, p. 84–102, 2026. DOI: 10.14512/rur.3365. Disponível em: https://rur.oekom.de/index.php/rur/article/view/3365. Acesso em: 15 aug. 2026.