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Frankfurt a. M.: European Central Bank (ECB), 2020
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World Bank, Washington, DC, 2010
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World Bank, Washington, DC, 2011
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Geneve: International Organization for Standardization, 1989
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Geneve: International Organization for Standardization, 1987
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Frankfurt am Main, Germany: European Central Bank, [2020]
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Elsevier BV, 2020