Pieter JAN KUIJPER, Fabian AMTENBRINK, Deirdre CURTIN, Bruno DE WITTE, Alison MCDONNELL and Stefaan VAN DEN BOGAERT (eds), The law of the European Union, Fifth edition, Deventer : Kluwer Law International, 2018, pp. 43-67
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- https://hdl.handle.net/1814/60154