@book { WhrungsmanagementininternationalagierendenUnternehmendesMittelstands,
    title = "Währungsmanagement in international agierenden Unternehmen des Mittelstands",
    author = "D. {Nagel}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836646307",
    url = "https://m.diplom.de/document/227769"
}