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Wielen, Lex van der, Willem van Alphen, Joost Bergen, and Phillip Lindow. International Cash Management: : A Practical Guide to Managing Cash Flows, Liquidity, Working Capital and Short-term Financial. Amsterdam: Riskmatrix, 2006.

Wielen, Lex van der, et al. International Cash Management: : A Practical Guide to Managing Cash Flows, Liquidity, Working Capital and Short-term Financial. Riskmatrix, 2006.