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U. Fischer, “How Does Social Exclusion Manifest Itself?,” in The Ruhr Region: A Region of Poverty—Facts, Background, and Possible Solutions, Essen: DIE LINKE Faction in the Ruhr Regional Association, 2017, pp. 7–9. Available: https://www.matthias-w-birkwald.de/kontext/controllers/document.php/656.c/2/3757.pdf