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[S.l.]: SSRN, [2013]
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[S.l.]: SSRN, [2016]
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World Bank, Washington, DC, 2010
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World Bank, Washington, DC, 2011
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Bonn: Bonn International Center for Conversion, March 2021
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[S.l.]: SSRN, [2014]
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[S.l.]: SSRN, [2013]
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[S.l.]: SSRN, 2012
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Washington, D.C: The World Bank, 2011
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Washington, D.C: The World Bank, 2010
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Washington, D.C: The World Bank, 2002 ; Online-Ausg.
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African Journals Online (AJOL), 2023
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SAGE Publications, 2023
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Bonn, 2021
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Molecular and Cellular Biomedical Sciences (MCBS) Office, 2024
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SAGE Publications, 2024
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Frontiers Media SA, 2023
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Hindawi Limited, 2021
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Public Library of Science (PLoS), 2021
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African Journals Online (AJOL), 2024