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Ein ausgezeichneter Bericht von Richard Poynder:http://poynder.blogspot.co.uk/2015/06/hefce-elsevier-copy-request-button-and.html"This is surely the long game publishers are playing: appropriate gold OA in a way that preserves their profits, while simultaneously seek to appropriate green OA in order to control it, and then gradually phase it out, thus ensuring a transition to a pay-to-publish environment that best suits their needs, and at a cost based on their asking price."Zum Button hier:?s=button+eprint