@book { DieBalancedScorecardalsstrategischesFhrungsinstrument,
    title = "Die Balanced Scorecard als strategisches Führungsinstrument",
    author = "Andrea {Gust}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832454531",
    url = "https://m.diplom.de/document/221005"
}