Roth, Michael, und Dietwald Gruehn. „Methods and Data to Describe Agricultural Landscapes and Their Cultural Values on National Level in Germany: Confusing Coexistence or Multilayered Complexity?“. TÁJÖKOLÓGIAI LAPOK 8, no. Suppl.1 (Dezember 30, 2010): 53–66. Zugegriffen Januar 20, 2026. https://journal.uni-mate.hu/index.php/tl/article/view/4049.