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Stuttgart: Enke, 1978
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Hamburg: Inst. für Internat. Politik an der Helmut-Schmidt-Univ., Univ. der Bundeswehr, 2007
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Frontiers Media SA, 2018
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Wiley, 2017
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Wiley, 2017
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Wiley, 2017
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Frontiers Media SA, 2018
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Ovid Technologies (Wolters Kluwer Health), 1995
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Ovid Technologies (Wolters Kluwer Health), 1995
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Springer Science and Business Media LLC, 2015
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Public Library of Science (PLoS), 2019