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MCCRUDDEN, Christopher, The Rüffert Case and Public Procurement, in Marise CREMONA (ed.), Market Integration and Public Services in the European Union, Oxford/New York, Oxford University Press, 2011, Collected Courses of the Academy of European Law, XIX/2, 117-148Collected Courses of the Academy of European Law, [AEL] - https://hdl.handle.net/1814/17619