@book { GestaltungundAnwendungdesBalancedScorecardSystems,
    title = "Gestaltung und Anwendung des Balanced-Scorecard-Systems",
    author = "Claudia {Lehmann}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832437367",
    url = "https://m.diplom.de/document/219420"
}