Makra, László, and Zoltán Sümeghy. “Environmental Objective Analysis, Ranking and Clustering of Hungarian Cities”. Acta Geographica Debrecina Landscape & Environment series 2, no. 2 (December 31, 2008): 91–108. Accessed May 4, 2024. https://ojs.lib.unideb.hu/landsenv/article/view/2254.