@book { DieBalancedScorecard,
    title = "Die Balanced Scorecard",
    author = "Bernhard {Blümm}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640718580",
    url = "https://www.hausarbeiten.de/document/158062"
}