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Saarbrücken: VDM Verlag Dr. Müller, 2007
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[S.l.]: SSRN, [2010]
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[S.l.]: SSRN, [2012]
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Hamburg, 2006
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Scientific Research Publishing, Inc., 2011
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SAGE Publications, 2013
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Springer Science and Business Media LLC, 2010
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Hogrefe Publishing Group, 2008
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Springer Science and Business Media LLC, 2009
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Canadian Center of Science and Education, 2015
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SAGE Publications, 2014
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SAGE Publications, 2011
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Springer Science and Business Media LLC, 2007
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Hogrefe Publishing Group, 2021