@book { BalancedScorecardalsBankenControllingInstrument,
    title = "Balanced Scorecard als Banken-Controlling-Instrument",
    author = "Christiane {Schappo}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836642156",
    url = "https://m.diplom.de/document/227572"
}